CN114792880B

CN114792880B - Dual-polarized rectenna with wide load

Info

Publication number: CN114792880B
Application number: CN202210277554.0A
Authority: CN
Inventors: 王健; 吴燕军; 霍建建; 陈臻奇
Original assignee: Ningbo University
Current assignee: Ningbo University
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2023-04-25
Anticipated expiration: 2042-03-21
Also published as: CN114792880A

Abstract

The invention discloses a wide-load dual-polarized rectifying antenna, which comprises a dual-polarized antenna and a dual-polarized rectifying circuit, wherein the dual-polarized rectifying circuit comprises a harmonic suppression structure, a matching circuit, an impedance compression circuit and a rectifying circuit, the harmonic suppression structure is used for transmitting an alternating current signal output by the dual-polarized antenna to the matching circuit and suppressing second harmonic and third harmonic generated by nonlinearity of the rectifying circuit in the alternating current signal, the matching circuit is used for performing impedance matching on the harmonic suppression structure and the impedance compression circuit, the input impedance of the impedance compression circuit is matched to 50Ω, the alternating current signal is output to the impedance compression circuit, the impedance compression circuit is used for outputting the alternating current signal to the rectifying circuit, the load range of the rectifying circuit is widened, and the rectifying circuit is used for converting the alternating current signal into direct current voltage and outputting the direct current voltage to a load for power supply; the advantage is that high rectification efficiency can be maintained when the load is changed from 1000 ohms to 3500 ohms.

Description

Dual-polarized rectenna with wide load

Technical Field

The invention relates to a dual-polarized rectenna, in particular to a wide-load dual-polarized rectenna.

Background

In recent years, with the rise of the internet of things, more and more sensor nodes need to be powered, but the traditional battery power supply mode is obviously not applicable to an application environment in which batteries are not easy to replace, such as some sensor nodes buried underground in a pipeline. Moreover, the bulk weight of the battery is not suitable for use in some sensor nodes. If the wireless energy transmission is adopted, the defects can be avoided, and the super capacitor used in the microwave energy transmission can be charged for hundreds of thousands of times, so that the frequency of battery replacement is greatly reduced, and the harm to the environment is reduced. The wireless energy transmission is not limited by the environment, and the wireless energy transmission is carried out through electromagnetic waves, unlike the traditional circuit which needs to transmit electric energy by means of wires. Thus, powering sensor nodes via rectenna power has been widely studied.

Conventional rectenna suffer from a significant loss of energy due to polarization mismatch, and dual polarized rectenna can solve this problem. The existing dual-polarized rectenna generally comprises a dual-polarized antenna and a dual-polarized rectenna circuit, wherein the dual-polarized antenna is used for receiving radio frequency microwave energy emitted by a transmitter and converting the radio frequency microwave energy into alternating current energy to be output to the dual-polarized rectenna circuit, and the dual-polarized rectenna circuit is used for converting the alternating current energy input into the dual-polarized rectenna circuit into direct current voltage to be output to power a load (namely a sensor node). The performance of the dual polarized rectifying circuit directly determines the rectifying efficiency (i.e., the power efficiency) of the dual polarized rectifying antenna. While existing dual-polarized rectifying circuits generally include a matching circuit and a rectifying circuit for matching a load, research on dual-polarized rectifying circuits is currently mostly based on a certain load, and the matching circuit is designed based on the certain load and can only be matched with the certain load. However, in practical applications, the load is always changed, and at this time, the load and the dual-polarized rectenna will be mismatched, resulting in a substantial reduction in the rectifying efficiency of the dual-polarized rectenna.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a wide-load dual-polarized rectenna which can still maintain high rectifying efficiency when the load is changed from 1000 ohms to 3500 ohms.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a wide-load dual-polarized rectenna, includes dual-polarized antenna and dual-polarized rectifier circuit, dual-polarized antenna be used for receiving the radio frequency microwave signal that the transmitter sent to and with this radio frequency microwave signal conversion be the alternating current signal output for dual-polarized rectifier circuit, dual-polarized rectifier circuit be used for with the alternating current signal that inputs its internal direct current voltage output for the load power supply, the radio frequency microwave signal be the fundamental frequency signal, dual-polarized rectifier circuit include harmonic suppression structure, matching circuit, impedance compression circuit and rectifier circuit, the harmonic suppression structure be used for with the alternating current signal transmission of dual-polarized antenna output to matching circuit to the second harmonic and the third harmonic that are produced because of rectifier circuit nonlinearity in the alternating current signal are restrained, avoid second harmonic and third harmonic to return to in the antenna and radiated the loss of alternating current energy that leads to, matching circuit be used for carrying out impedance matching to the alternating current signal of impedance compression circuit to 50 omega, and will the alternating current signal output to the impedance compression circuit, the impedance compression circuit will not change for the load compression circuit is the change with the alternating current signal's the rectifier circuit's the change the output, the rectifier circuit is the load is greatly changed.

The dual-polarized antenna is provided with a first output end and a second output end, the harmonic suppression circuit is provided with a first input end, a second input end, a first output end and a second output end, the matching circuit is provided with a first input end, a second input end, a first output end and a second output end, the impedance compression circuit is provided with a first input end, a second input end, a first output end and a second output end, the rectifying circuit is provided with a first input end, a second input end and an output end, the first output end of the dual-polarized antenna is connected with the first input end of the harmonic suppression circuit, the second output end of the dual-polarized antenna is connected with the second input end of the harmonic suppression circuit, the first output end of the harmonic suppression circuit is connected with the first input end of the matching circuit, the second output end of the harmonic suppression circuit is connected with the second input end of the matching circuit, the first output end of the matching circuit is connected with the first input end of the first impedance compression circuit, the first output end of the rectifying circuit is connected with the second input end of the rectifying circuit, and the second output end of the rectifying circuit is connected with the first input end of the rectifying circuit is connected with the second input end of the matching circuit; the harmonic suppression structure comprises a first rectangular microstrip line, a second rectangular microstrip line, a third rectangular microstrip line, a fourth rectangular microstrip line, a fifth rectangular microstrip line, a sixth rectangular microstrip line, a first fan-shaped microstrip line and a second fan-shaped microstrip line, wherein one end of the first rectangular microstrip line is a first input end of the harmonic suppression structure, the other end of the first rectangular microstrip line is respectively connected with one end of the second rectangular microstrip line, one end of the third rectangular microstrip line and the first fan-shaped microstrip line, the other end of the third rectangular microstrip line is a first output end of the harmonic suppression structure, the second rectangular microstrip line is an open branch line, one end of the fourth rectangular microstrip line is a second input end of the harmonic suppression structure, the other end of the fourth rectangular microstrip line is respectively connected with one end of the fifth rectangular microstrip line, one end of the sixth rectangular microstrip line and the second fan-shaped microstrip line, the other end of the sixth rectangular microstrip line is a second output end of the harmonic suppression structure, the fifth rectangular microstrip line is an open branch node line, the lengths of the second rectangular microstrip line and the fifth rectangular microstrip line are equal, the value range of the second rectangular microstrip line is 0.8λ1 to 1.2λ1, wherein λ1 is one quarter of the wavelength of the second harmonic, the radiuses of the first fan-shaped microstrip line and the second fan-shaped microstrip line are equal, and the value range of the first fan-shaped microstrip line and the second fan-shaped microstrip line is 0.8λ2 to 1.2λ2, wherein λ2 is one quarter of the wavelength of the third harmonic; the matching circuit comprises a seventh rectangular microstrip line, an eighth rectangular microstrip line, a ninth rectangular microstrip line, a tenth rectangular microstrip line, an eleventh rectangular microstrip line and a twelfth rectangular microstrip line, wherein one end of the seventh rectangular microstrip line is connected with one end of the eighth rectangular microstrip line and the connecting end of the eighth rectangular microstrip line is a first input end of the matching circuit, the other end of the eighth rectangular microstrip line is connected with one end of the ninth rectangular microstrip line and the connecting end of the eighth rectangular microstrip line is a first output end of the matching circuit, the ninth rectangular microstrip line is a short-circuit branch line, one end of the tenth rectangular microstrip line is connected with one end of the eleventh rectangular microstrip line and the connecting end of the eleventh rectangular microstrip line is a second input end of the matching circuit, the other end of the eleventh rectangular microstrip line is connected with one end of the twelfth rectangular microstrip line and the connecting end of the twelfth rectangular microstrip line is a second output end of the matching circuit, and the twelfth rectangular microstrip line is a short-circuit branch line; the impedance compression circuit comprises a thirteenth rectangular microstrip line, a fourteenth rectangular microstrip line, a fifteenth rectangular microstrip line, a sixteenth rectangular microstrip line, a seventeenth rectangular microstrip line and an eighteenth rectangular microstrip line, wherein one end of the thirteenth rectangular microstrip line is a first input end of the impedance compression circuit, the other end of the thirteenth rectangular microstrip line, one end of the fourteenth rectangular microstrip line and one end of the fifteenth rectangular microstrip line are connected, the other end of the fourteenth rectangular microstrip line is grounded, the other end of the fifteenth rectangular microstrip line is a first output end of the impedance compression circuit, the fourteenth rectangular microstrip line is a short-circuit branch line, one end of the sixteenth rectangular microstrip line is a second input end of the impedance compression circuit, one end of the sixteenth rectangular microstrip line, one end of the seventeenth rectangular microstrip line and one end of the eighteenth rectangular microstrip line are connected, the other end of the seventeenth rectangular microstrip line is grounded, and the other end of the eighteenth rectangular microstrip line is a second output end of the microstrip line of the seventeenth rectangular microstrip line; the rectification circuit comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first diode, a second diode, a third diode, a fourth diode, a nineteenth rectangular microstrip line, a twenty-first rectangular microstrip line, a twenty-second rectangular microstrip line, a twenty-third rectangular microstrip line, a twenty-fourth rectangular microstrip line, a twenty-fifth rectangular microstrip line and a twenty-sixth rectangular microstrip line; one end of the first capacitor is a first input end of the rectifying circuit, the other end of the first capacitor is connected with one end of the nineteenth rectangular microstrip line, the other end of the nineteenth rectangular microstrip line, the negative electrode of the first diode and the positive electrode of the second diode are connected, the positive electrode of the first diode is grounded, the negative electrode of the second diode is connected with one end of the twentieth rectangular microstrip line, the other end of the twentieth rectangular microstrip line, one end of the twenty first rectangular microstrip line and one end of the twenty second rectangular microstrip line are connected, the other end of the twenty second rectangular microstrip line is connected with one end of the second capacitor, the other end of the second capacitor is grounded, the other end of the twenty-first rectangular microstrip line is connected with one end of the twenty-fifth rectangular microstrip line, the connecting end of the twenty-fifth rectangular microstrip line is the output end of the rectifying circuit, one end of the third capacitor is the second input end of the rectifying circuit, the other end of the third capacitor is connected with one end of the twenty-third rectangular microstrip line, the other end of the twenty-third rectangular microstrip line, the negative electrode of the third diode and the positive electrode of the fourth diode are connected, the positive electrode of the third diode is grounded, the negative electrode of the fourth diode is connected with one end of the twenty-fourth rectangular microstrip line, the other end of the twenty-fifth rectangular microstrip line and one end of the twenty-sixth rectangular microstrip line are connected, the other end of the twenty-sixth rectangular microstrip line is connected with one end of the fourth capacitor, the other end of the fourth capacitor is grounded. The harmonic suppression circuit of the dual-polarized rectification circuit is characterized in that the second rectangular microstrip line and the fifth rectangular microstrip line are arranged to form a band-stop filter of a second harmonic in a length which is close to or equal to one fourth of the wavelength of the second harmonic, so that the suppression of the second harmonic is realized, the first fan-shaped microstrip line and the second fan-shaped microstrip line are used for preventing the harmonic suppression circuit from forming coupling through current on one hand, and on the other hand, the radius of the first fan-shaped microstrip line and the radius of the second fan-shaped microstrip line are arranged to be close to or equal to one fourth of the wavelength of the third harmonic so as to form the band-stop filter of the third harmonic, the third harmonic suppression is realized, the matching circuit adopts double-branch matching, the effect is that the fourteenth rectangular microstrip line and the seventeenth rectangular microstrip line of the impedance compression circuit are led into a short-circuit branch first line, the effect is equivalent to that a section of impedance is led into the dual-polarized rectification circuit to be connected in parallel with the impedance of the rectification circuit, and the impedance range is also reduced after the impedance is connected in parallel, so that the final rectification circuit adopts a direct-voltage signal which is very low in voltage to be converted into a direct current signal with very high voltage.

The dual-polarized antenna comprises a radiation patch, a first medium substrate, a grounding patch, a second medium substrate, a first feeder line and a second feeder line, wherein the first medium substrate is positioned above the second medium substrate and is provided with a distance between the two rectangular plates, the front end surface of the first medium substrate and the front end surface of the second medium substrate are flush, the rear end surface of the first medium substrate is flush with the rear end surface of the second medium substrate, the left end surface of the first medium substrate is flush with the left end surface of the second medium substrate, the right end surface of the first medium substrate is flush with the right end surface of the second medium substrate, the radiation patch is realized by adopting a first rectangular metal sheet, the radiation patch is attached to the upper surface of the first medium substrate, the central axis of the radiation patch coincides with the central axis of the first medium substrate, the front end surface of the radiation patch is flush with the front end surface of the second medium substrate, the front end surface of the radiation patch is parallel to the front end surface of the second medium substrate, the front surface of the radiation patch is parallel to the front surface of the second medium substrate, the radiation patch is realized by adopting a first rectangular metal sheet, the left end face of the second dielectric substrate is flush with the left end face of the grounding patch, the right end face of the second dielectric substrate is flush with the right end face of the grounding patch, two gaps are formed in the grounding patch and are H-shaped, the second dielectric substrate is exposed at the two gaps, the two gaps are respectively called a first gap and a second gap, the first gap and the second gap are symmetrical about the diagonal line of the lower left vertex and the upper right vertex of the grounding patch, the first gap is composed of a first rectangular groove, a second rectangular groove and a third rectangular groove, the first rectangular groove extends along the left-right direction, the second rectangular groove is positioned at the left side of the first rectangular groove and is perpendicular to the first rectangular groove, the second rectangular groove is communicated with the first rectangular groove, the symmetry line of the first rectangular groove along the left-right direction coincides with the symmetry line of the second rectangular groove along the left-right direction, the third rectangular groove is positioned on the right side of the first rectangular groove, the third rectangular groove and the second rectangular groove are bilaterally symmetrical relative to the first rectangular groove, the symmetry line of the first rectangular groove along the front-back direction coincides with the symmetry line of the grounding patch along the front-back direction, the second gap consists of a fourth rectangular groove, a fifth rectangular groove and a sixth rectangular groove, the fourth rectangular groove extends along the front-back direction, the fifth rectangular groove is positioned on the front side of the fourth rectangular groove and is perpendicular to the fourth rectangular groove, the fifth rectangular groove is communicated with the fourth rectangular groove, the fourth rectangular slot is overlapped with the fifth rectangular slot along the front-back direction, the sixth rectangular slot is positioned at the rear side of the fourth rectangular slot, the sixth rectangular slot and the fifth rectangular slot are symmetrical back and forth relative to the fourth rectangular slot, the fourth rectangular slot is overlapped with the grounding patch along the left-right direction along the symmetry line, the first feeder line and the second feeder line are attached on the lower surface of the second dielectric substrate, the first feeder line and the second feeder line are symmetrical relative to the diagonal line of the left lower vertex and the right upper vertex of the lower surface of the second dielectric substrate, the first feeder line is composed of a twenty-seventh rectangular line and a twenty-eighth rectangular microstrip line, the twenty-seventh rectangular microstrip line extends along the front-back direction, the symmetrical line of the twenty-seventh rectangular microstrip line along the front-rear direction coincides with the symmetrical line of the second dielectric substrate along the front-rear direction, the rear end of the twenty-seventh rectangular microstrip line is connected with one end of the twenty-eighth rectangular microstrip line, the included angle between the rear end of the twenty-seventh rectangular microstrip line and the twenty-eighth rectangular microstrip line is 135 degrees, the twenty-eighth rectangular microstrip line is parallel to the diagonal line of the left lower vertex and the right upper vertex of the lower surface of the second dielectric substrate, the second feeder line consists of the twenty-ninth rectangular microstrip line and the thirty-ninth rectangular microstrip line, the twenty-ninth rectangular microstrip line extends reversely along the left and right direction, the symmetrical line of the twenty-ninth rectangular microstrip line along the left and right direction coincides with the symmetrical line of the second dielectric substrate along the left and right direction, the left end of the twenty-ninth rectangular microstrip line is connected with one end of the thirty-ninth rectangular microstrip line, an included angle between the rear end of the twenty-ninth rectangular microstrip line and the thirty-eighth rectangular microstrip line is 135 degrees, the thirty-eighth rectangular microstrip line is parallel to a diagonal line of a lower left vertex and an upper right vertex of the lower surface of the second dielectric substrate, the other end of the twenty-eighth rectangular microstrip line is a first output end of the dual-polarized antenna, and the other end of the thirty-eighth rectangular microstrip line is a second output end of the dual-polarized antenna. The dual-polarized antenna is mainly realized through a patch structure, is simple in structure and easy to manufacture, has a small volume, is provided with the radiation patch which is a square patch, and ensures the capability of receiving electromagnetic wave signals to the greatest extent, so that the gain of the dual-polarized antenna is higher, the radiation patch receives energy which is coupled to two feed lines through air and two H-shaped gaps, and then the energy is transmitted to a dual-polarized rectifying circuit for rectification, and the two feed lines are separated from the radiation patch and cannot be influenced mutually, so that the high gain of the dual-polarized antenna is further ensured.

The distance between the front end of the twenty-seventh rectangular microstrip line and the front end of the grounding patch is 13.2mm, the length of the twenty-seventh rectangular microstrip line along the left-right direction is 1.8mm, the length of the twenty-eighth rectangular microstrip line along the front-rear direction is 11mm, the length of the twenty-eighth rectangular microstrip line along the front-rear direction is 6mm, the length of the twenty-eighth rectangular microstrip line along the diagonal direction between the upper left vertex and the lower right vertex of the second dielectric substrate is 1.8mm, the length of the first rectangular slot along the front-rear direction is 8mm, the length of the first rectangular slot along the left-right direction is 2.2mm, the distance between the front end surface of the first rectangular slot and the front end surface of the grounding patch is 15mm, the length of the second rectangular slot along the front-rear direction is 0.3mm, the length of the left-right direction is 10mm, the length of the radiation along the front-rear direction is 47mm, the length of the thickness of the twenty-eighth rectangular microstrip line along the left-right direction is 0.035, the length of the first dielectric substrate along the front-rear direction is 0.813mm, the thickness of the first rectangular slot is 0.813mm, the thickness of the first dielectric substrate along the front-rear direction is 0.813mm, the front-rear direction is 0.70 mm, the thickness of the front-rear dielectric substrate along the front-rear direction is 0 mm; the distance between the first medium substrate and the second medium substrate is 4mm; the dual-polarized rectifying circuit is arranged on the lower surface of the second dielectric substrate, the harmonic suppression structure, the matching circuit, the impedance compression circuit and the rectifying circuit are sequentially arranged from left to right, the length of the first rectangular microstrip line along the left and right direction is 6mm, the length of the second rectangular microstrip line along the front and rear direction is 1.8mm, the length of the second rectangular microstrip line along the left and right direction (i.e. the width of the second rectangular microstrip line) is 1.8mm, the length of the third rectangular microstrip line along the left and right direction (i.e. the length of the second rectangular microstrip line) is 5.1mm, the length of the third rectangular microstrip line along the left and right direction is 2mm, the length of the fourth rectangular microstrip line along the left and right direction is 1.8mm, the length of the fourth rectangular microstrip line along the left and right direction is 6mm, the length of the fifth rectangular microstrip line along the left and right direction (i.e. the width of the fifth rectangular microstrip line) is 1.8mm, the length along the front-back direction (namely the length of the fifth rectangular microstrip line) is 5.1mm, the length along the left-right direction of the sixth rectangular microstrip line is 2mm, the length along the front-back direction of the sixth rectangular microstrip line is 1.8mm, the angle of the first sector microstrip line is 90 degrees, the radius is 6mm, the angle of the second sector microstrip line is 90 degrees, the radius is 6mm, the length along the left-right direction of the seventh rectangular microstrip line is 1mm, the length along the front-back direction of the seventh rectangular microstrip line is 11.6mm, the length along the left-right direction of the eighth rectangular microstrip line is 5mm, the length along the front-back direction of the eighth rectangular microstrip line is 2.6mm, the length along the left-right direction of the ninth rectangular microstrip line is 1mm, the length along the front-back direction of the ninth rectangular microstrip line is 5mm, the length along the left-right direction of the tenth rectangular microstrip line is 1.8mm, the length along the front-back direction of the eighth rectangular microstrip line is 11.6mm, the length of the eleventh rectangular microstrip line in the left-right direction is 5mm, the length of the twelfth rectangular microstrip line in the front-rear direction is 1mm, the length of the twelfth rectangular microstrip line in the left-right direction is 2.6mm, the length of the thirteenth rectangular microstrip line in the front-rear direction is 5mm, the length of the thirteenth rectangular microstrip line in the left-right direction is 11.6mm, the length of the thirteenth rectangular microstrip line in the front-rear direction is 1mm, the length of the fourteenth rectangular microstrip line in the left-right direction is 1.8mm, the length of the thirteenth rectangular microstrip line in the front-rear direction is 15mm, the length of the fifteenth rectangular microstrip line in the left-right direction is 0.8mm, the length of the sixteenth rectangular microstrip line in the front-rear direction is 1.8mm, the length of the seventeenth rectangular microstrip line in the left-right direction is 1.8mm, the length of the eighteenth microstrip line in the front-rear direction is 1.8mm, the nineteenth rectangular microstrip line has a length of 3.3mm in the left-right direction, a length of 1.8mm in the front-rear direction, the twenty-fourth rectangular microstrip line has a length of 3mm in the left-right direction, a length of 1.8mm in the front-rear direction, a length of 1.8mm in the left-right direction, a length of 5.7mm in the front-rear direction, a length of 1.8mm in the left-right direction, a length of 2.5mm in the front-rear direction, a length of 3.3mm in the left-right direction, a length of 1.8mm in the front-rear direction, a length of 3mm in the front-rear direction, a length of 1.8mm in the left-right direction, a length of 5.7mm in the front-rear direction, a length of 1.8mm in the left-right direction, a length of the twenty-fourth rectangular microstrip line, the length in the front-rear direction was 2.5mm.

Compared with the prior art, the dual-polarized rectifier circuit is formed by the harmonic suppression structure, the matching circuit, the impedance compression circuit and the rectifying circuit, the harmonic suppression structure is used for transmitting the alternating current signal output by the dual-polarized antenna to the matching circuit, and suppressing the second harmonic and the third harmonic generated by nonlinearity of the rectifying circuit in the alternating current signal, so that loss of alternating current energy caused by the fact that the second harmonic and the third harmonic return to the dual-polarized antenna and are radiated is avoided, the matching circuit is used for carrying out impedance matching on the harmonic suppression structure and the impedance compression circuit, the input impedance of the impedance compression circuit is matched to 50Ω, the alternating current signal is output to the impedance compression circuit, the impedance compression circuit is used for outputting the alternating current signal to the rectifying circuit, the load range of the rectifying circuit is widened, the impedance of the rectifying circuit cannot be greatly changed along with the change of the load, the aim of impedance compression is achieved, and the rectifying circuit is used for converting the alternating current signal into the direct current voltage to be supplied to the load, so that the loss of the alternating current energy can be reduced, the load range of the rectifying circuit can be widened, and high rectifying efficiency can be kept when the load is changed from 1000 ohms to 3500 ohms.

Drawings

Fig. 1 is a circuit diagram of a dual polarized rectifying circuit of a wide load dual polarized rectenna of the present invention;

fig. 2 is a top view of a dual polarized antenna of the wide load dual polarized rectenna of the present invention;

fig. 3 is a schematic structural diagram of a second dielectric substrate and a ground patch of the dual-polarized antenna of the wide-load dual-polarized rectenna of the present invention;

fig. 4 is a schematic structural view of a second dielectric substrate and two feed lines of the dual polarized antenna of the wide load dual polarized antenna of the present invention;

fig. 5 is a front view of a dual polarized antenna of the wide load dual polarized antenna of the present invention;

fig. 6 is a diagram showing the return loss, isolation simulation and actual measurement of the wide-load dual-polarized antenna of the present invention;

fig. 7 is a simulated radiation pattern of the wide-load dual-polarized antenna of the present invention;

FIG. 8 is a comparison of efficiency simulations and actual measurements of the wide-load dual-polarized rectenna of the present invention;

fig. 9 is a graph showing the actual measurement of the efficiency of the wide-load dual-polarized rectenna of the present invention in different directions of incidence.

Fig. 10 is a comparison of efficiency simulations and actual measurements of a wide-load dual-polarized rectenna of the present invention at different loads;

Detailed Description

The invention is described in further detail below with reference to the embodiments of the drawings.

Examples: the utility model provides a wide-load dual-polarized rectenna, including dual-polarized antenna and dual-polarized rectifier circuit, dual-polarized antenna is used for receiving the radio frequency microwave signal that the transmitter sent, and export this radio frequency microwave signal to dual-polarized rectifier circuit with alternating current signal, dual-polarized rectifier circuit is used for the alternating current signal who inputs it to direct current voltage output for the load power supply, radio frequency microwave signal is the fundamental frequency signal, dual-polarized rectifier circuit includes harmonic suppression structure, matching circuit, impedance compression circuit and rectifier circuit, harmonic suppression structure is used for transmitting the alternating current signal that dual-polarized antenna output to matching circuit, and suppress the second harmonic and the third harmonic that produce because rectifier circuit nonlinearity in the alternating current signal, avoid second harmonic and third harmonic to return to the dual-polarized antenna and radiated and lead to the loss of alternating current energy, matching circuit is used for carrying out impedance matching to harmonic suppression structure and impedance compression circuit, the input impedance matching to 50 omega of impedance compression circuit, and export the alternating current signal to impedance compression circuit, impedance compression circuit is used for exporting the alternating current signal to rectifier circuit, and the load range of rectifier circuit, make rectifier circuit can not appear great change along with the load electric signal, realize the rectification voltage is used for exporting the purpose of direct current compression.

As shown in fig. 1, in this embodiment, the dual-polarized antenna has a first output end and a second output end, the harmonic suppression circuit has a first input end, a second input end, a first output end and a second output end, the matching circuit has a first input end, a second input end, a first output end and a second output end, the impedance compression circuit has a first input end, a second input end, a first output end and a second output end, the rectifying circuit has a first input end, a second input end and an output end, the first output end of the dual-polarized antenna is connected with the first input end of the harmonic suppression circuit, the second output end of the dual-polarized antenna is connected with the second input end of the harmonic suppression circuit, the first output end of the harmonic suppression circuit is connected with the first input end of the matching circuit, the second output end of the harmonic suppression circuit is connected with the second input end of the matching circuit, the first output end of the matching circuit is connected with the first input end of the impedance compression circuit, the second output end of the matching circuit is connected with the second input end of the impedance compression circuit, the first output end of the impedance compression circuit is connected with the rectifying circuit, and the second output end of the rectifying circuit is connected with the output end of the rectifying circuit; the harmonic suppression structure comprises a first rectangular microstrip line TL1, a second rectangular microstrip line TL2, a third rectangular microstrip line TL3, a fourth rectangular microstrip line TL4, a fifth rectangular microstrip line TL5, a sixth rectangular microstrip line TL6, a first sector microstrip line M1 and a second sector microstrip line M2, one end of the first rectangular microstrip line TL1 is a first input end of the harmonic suppression structure, the other end of the first rectangular microstrip line TL1 is respectively connected with one end of the second rectangular microstrip line TL2, one end of the third rectangular microstrip line TL3 and the first sector microstrip line M1, the other end of the third rectangular microstrip line TL3 is a first output end of the harmonic suppression structure, the second rectangular microstrip line TL2 is an open-circuit branch line, one end of the fourth rectangular microstrip TL4 is a second input end of the harmonic suppression structure, the other end of the fourth rectangular microstrip TL4 is connected with one end of the fifth rectangular microstrip TL5, one end of the sixth rectangular microstrip TL6 and the second fan-shaped microstrip M2 respectively, the other end of the sixth rectangular microstrip TL6 is a second output end of the harmonic suppression structure, the fifth rectangular microstrip TL5 is an open branch line, the lengths of the second rectangular microstrip TL2 and the fifth rectangular microstrip TL5 are equal, the value range is 0.8λ1 to 1.2λ1, wherein λ1 is a quarter of the second harmonic wavelength, the radii of the first fan-shaped microstrip M1 and the second fan-shaped microstrip M2 are equal, and the value range is 0.8λ2 to 1.2λ2, wherein λ2 is a quarter of the third harmonic wavelength; the matching circuit comprises a seventh rectangular microstrip line TL7, an eighth rectangular microstrip line TL8, a ninth rectangular microstrip line TL9, a tenth rectangular microstrip line TL10, an eleventh rectangular microstrip line TL11 and a twelfth rectangular microstrip line TL12, wherein one end of the seventh rectangular microstrip line TL7 is connected with one end of the eighth rectangular microstrip line TL8 and the connection end of the eighth rectangular microstrip line TL8 is a first input end of the matching circuit, the other end of the eighth rectangular microstrip line TL8 is connected with one end of the ninth rectangular microstrip line TL9 and the connection end of the eighth rectangular microstrip line TL9 is a first output end of the matching circuit, the ninth rectangular microstrip line TL9 is a short-circuited branch line, one end of the tenth rectangular microstrip line TL10 is connected with one end of the eleventh rectangular microstrip line TL11 and the connection end of the eleventh rectangular microstrip line TL12 is a second input end of the matching circuit, the other end of the eleventh rectangular microstrip line TL11 is connected with one end of the twelfth rectangular microstrip line TL12 and the connection end of the twelfth rectangular microstrip line TL12 is a second output end of the matching circuit, and the twelfth rectangular microstrip line TL12 is a short-circuited branch line; the impedance compression circuit comprises a thirteenth rectangular microstrip line TL13, a fourteenth rectangular microstrip line TL14, a fifteenth rectangular microstrip line TL15, a sixteenth rectangular microstrip line TL16, a seventeenth rectangular microstrip line TL17 and an eighteenth rectangular microstrip line TL18, one end of the thirteenth rectangular microstrip line TL13 is a first input end of the impedance compression circuit, the other end of the thirteenth rectangular microstrip line TL13, one end of the fourteenth rectangular microstrip line TL14 and one end of the fifteenth rectangular microstrip line TL15 are connected, the other end of the fourteenth rectangular microstrip line TL14 is grounded, the other end of the fifteenth rectangular microstrip line TL15 is a first output end of the impedance compression circuit, the fourteenth rectangular microstrip line TL14 is a short-circuit branch line, one end of the sixteenth rectangular microstrip line TL16 is a second input end of the impedance compression circuit, one end of the seventeenth rectangular microstrip line TL16, one end of the seventeenth rectangular microstrip line TL17 is connected with one end of the eighteenth rectangular microstrip line TL18, the other end of the seventeenth rectangular microstrip line TL17 is grounded, the other end of the eighteenth rectangular microstrip line TL18 is a second output end of the impedance compression circuit, and the seventeenth rectangular microstrip line TL17 is a short-circuit; the rectification circuit comprises a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a nineteenth rectangular microstrip line TL19, a twenty-first rectangular microstrip line TL20, a twenty-first rectangular microstrip line TL21, a twenty-second rectangular microstrip line TL22, a twenty-third rectangular microstrip line TL23, a twenty-fourth rectangular microstrip line TL24, a twenty-fifth rectangular microstrip line TL25 and a twenty-sixth rectangular microstrip line TL26; one end of the first capacitor C1 is a first input end of the rectifying circuit, the other end of the first capacitor C1 is connected with one end of a nineteenth rectangular microstrip line TL19, the other end of the nineteenth rectangular microstrip line TL19, the negative electrode of the first diode D1 and the positive electrode of the second diode D2 are connected, the positive electrode of the first diode D1 is grounded, the negative electrode of the second diode D2 is connected with one end of a twenty-fifth rectangular microstrip line TL20, the other end of the twenty-first rectangular microstrip line TL20, one end of the twenty-first rectangular microstrip line TL21 is connected with one end of a twenty-second rectangular microstrip line TL22, the other end of the twenty-second rectangular microstrip line TL22 is connected with one end of the second capacitor C2, the other end of the twenty-first rectangular microstrip line TL21 is grounded with one end of the twenty-fifth rectangular microstrip line TL25 and the connecting end is an output end of the rectifying circuit, one end of the third capacitor C3 is a second input end of the rectifying circuit, the other end of the third capacitor C3 is connected with one end of a twenty-third rectangular microstrip line TL23, the other end of the twenty-third rectangular microstrip line TL23, the negative electrode reaching the third diode D3 and the positive electrode of the fourth diode D4 are connected, the positive electrode of the third diode D3 is grounded, the negative electrode of the fourth diode D4 is connected with one end of a twenty-fourth rectangular microstrip line TL24, the other end of the twenty-fourth rectangular microstrip line TL24, the other end of a twenty-fifth rectangular microstrip line TL25 and one end of a twenty-sixth rectangular microstrip line TL26 are connected, the other end of the twenty-sixth rectangular microstrip line TL26 is connected with one end of the fourth capacitor C4, and the other end of the fourth capacitor C4 is grounded.

As shown in fig. 2-5, in this embodiment, the dual-polarized antenna includes a radiation patch 1, a first dielectric substrate 2, a ground patch 3, a second dielectric substrate 4, a first feeder line and a second feeder line, where the first dielectric substrate 2 is located above the second dielectric substrate 4 and has a distance therebetween, the first dielectric substrate 2 and the second dielectric substrate 4 are two rectangular plates with identical dimensions, the front end surface of the first dielectric substrate 2 is flush with the front end surface of the second dielectric substrate 4, the rear end surface of the first dielectric substrate 2 is flush with the rear end surface of the second dielectric substrate 4, the left end surface of the first dielectric substrate 2 is flush with the left end surface of the second dielectric substrate 4, the right end surface of the first dielectric substrate 2 is flush with the right end surface of the second dielectric substrate 4, the radiation patch 1 is implemented by using a first rectangular metal sheet, the radiation patch 1 is attached to the upper surface of the first dielectric substrate 2, the central axis of the radiation patch 1 coincides with the central axis of the first dielectric substrate 2, the plane of the front end face of the radiation patch 1 is parallel to the front end face of the first dielectric substrate 2, the length of the radiation patch 1 along the left-right direction is smaller than that of the first dielectric substrate 2, the length of the radiation patch 1 along the front-back direction is smaller than that of the first dielectric substrate 2 along the front-back direction, the grounding patch 3 is realized by adopting a second rectangular metal sheet, the grounding patch 3 is attached to the upper surface of the second dielectric substrate 4, the front end face of the second dielectric substrate 4 is flush with the front end face of the grounding patch 3, the rear end face of the second dielectric substrate 4 is flush with the rear end face of the grounding patch 3, the left end face of the second dielectric substrate 4 is flush with the left end face of the grounding patch 3, the right end face of the second dielectric substrate 4 is flush with the right end face of the grounding patch 3, two gaps are arranged on the grounding patch 3, the two slots are H-shaped, the second dielectric substrate 4 is exposed at the two slots, the two slots are respectively called a first slot and a second slot, the first slot and the second slot are symmetrical about the diagonal line of the lower left top and the upper right top of the grounding patch 3, the first slot is composed of a first rectangular slot 5, a second rectangular slot 6 and a third rectangular slot 7, the first rectangular slot 5 extends along the left-right direction, the second rectangular slot 6 is positioned at the left side of the first rectangular slot 5 and is perpendicular to the first rectangular slot 5, the second rectangular slot 6 is communicated with the first rectangular slot 5, the symmetrical line of the first rectangular slot 5 along the left-right direction coincides with the symmetrical line of the second rectangular slot 6 along the left-right direction, the third rectangular slot 7 is positioned at the right side of the first rectangular slot 5, the third rectangular slot 7 and the second rectangular slot 6 are symmetrical left-right relative to the first rectangular slot 5, the symmetry line of the first rectangular groove 5 along the front-rear direction coincides with the symmetry line of the ground patch 3 along the front-rear direction, the second gap is composed of a fourth rectangular groove 8, a fifth rectangular groove 9 and a sixth rectangular groove 10, the fourth rectangular groove 8 extends along the front-rear direction, the fifth rectangular groove 9 is positioned at the front side of the fourth rectangular groove 8 and is perpendicular to the fourth rectangular groove 8, the fifth rectangular groove 9 is communicated with the fourth rectangular groove 8, the symmetry line of the fourth rectangular groove 8 along the front-rear direction coincides with the symmetry line of the fifth rectangular groove 9 along the front-rear direction, the sixth rectangular groove 10 is positioned at the rear side of the fourth rectangular groove 8, the sixth rectangular groove 10 and the fifth rectangular groove 9 are in front-rear symmetry relative to the fourth rectangular groove 8, the symmetry line of the fourth rectangular groove 8 along the left-right direction coincides with the symmetry line of the ground patch 3 along the left-right direction, the first feeder line and the second feeder line are attached on the lower surface of the second dielectric substrate 4, the first feeder line and the second feeder line are symmetrical about the diagonal line of the lower left vertex and the upper right vertex of the lower surface of the second dielectric substrate 4, the first feeder line is composed of a twenty-seventh rectangular microstrip line TL27 and a twenty-eighth rectangular microstrip line TL28, the twenty-seventh rectangular microstrip line TL27 extends in the front-rear direction, the symmetry line of the twenty-seventh rectangular microstrip line TL27 in the front-rear direction coincides with the symmetry line of the second dielectric substrate 4 in the front-rear direction, the rear end of the twenty-seventh rectangular microstrip line TL27 is connected with one end of the twenty-eighth rectangular microstrip line TL28, the included angle between the rear end of the twenty-seventh rectangular microstrip line TL27 and the twenty-eighth rectangular microstrip line TL28 is 135 degrees, the twenty-eighth rectangular microstrip line TL28 is parallel to the diagonal line of the lower left vertex and the upper right vertex of the lower surface of the second dielectric substrate 4, the second feeder line is composed of a twenty-ninth rectangular microstrip line TL29 and a thirty-ninth rectangular microstrip line TL30, the twenty-ninth rectangular microstrip line TL29 extends along the left-right direction reversely, the symmetry line of the twenty-ninth rectangular microstrip line TL29 along the left-right direction coincides with the symmetry line of the second dielectric substrate 4 along the left-right direction, the left end of the twenty-ninth rectangular microstrip line TL29 is connected with one end of the thirty-ninth rectangular microstrip line TL30, the included angle between the rear end of the twenty-ninth rectangular microstrip line TL29 and the thirty-eighth rectangular microstrip line TL30 is 135 degrees, the thirty-eighth rectangular microstrip line TL30 is parallel to the diagonal line of the left lower vertex and the right upper vertex of the lower surface of the second dielectric substrate 4, the other end of the twenty-eighth rectangular microstrip line TL28 is the first output end of the dual-polarized antenna, and the other end of the thirty-eighth rectangular microstrip line TL30 is the second output end of the dual-polarized antenna.

In this embodiment, the distance between the front end of the twenty-seventh rectangular microstrip line TL27 and the front end of the ground patch 3 is 13.2mm, the length of the twenty-seventh rectangular microstrip line TL27 in the left-right direction is 1.8mm, the length in the front-rear direction is 11mm, the length of the twenty-eighth rectangular microstrip line TL28 from one end to the other end is 6mm, the length of the twenty-eighth rectangular microstrip line TL28 in the diagonal direction of the upper left vertex and the lower right vertex of the second dielectric substrate 4 is 1.8mm, the length of the first rectangular groove 5 in the front-rear direction is 8mm, the length in the left-right direction is 2.2mm, the distance between the front end face of the first rectangular groove 5 and the front end face of the ground patch 3 is 15mm, the length in the front-rear direction is 0.3mm, the length in the left-right direction is 10mm, the length in the front-rear direction of the radiation patch 1 is 47mm, the length in the left-right direction is 47mm, the thickness is 0.035mm, the length in the front-rear direction of the first dielectric substrate 2 is 70.035 mm, the length in the front-rear direction is 70mm, the thickness of the front-rear substrate is 0.0350 mm, the thickness in the front-rear direction is 0.813mm, the length in the front-rear direction is 0.3 mm; the distance between the first dielectric substrate 2 and the second dielectric substrate 4 is 4mm; the dual polarization rectification circuit is disposed on the lower surface of the second dielectric substrate 4, the harmonic suppression structure, the matching circuit, the impedance compression circuit, and the rectification circuit are sequentially arranged in the order from left to right, the length of the first rectangular microstrip line TL1 in the left-right direction is 6mm, the length in the front-rear direction is 1.8mm, the length of the second rectangular microstrip line TL2 in the left-right direction (width of the second rectangular microstrip line TL 2) is 1.8mm, the length in the front-rear direction (length of the second rectangular microstrip line TL 2) is 5.1mm, the length of the third rectangular microstrip line TL3 in the left-right direction is 2mm, the length in the front-rear direction is 1.8mm, the length of the fourth rectangular microstrip line TL4 in the left-right direction is 6mm, the length in the front-rear direction is 1.8mm, the length of the fifth rectangular microstrip line TL5 in the left-right direction (width of the fifth rectangular microstrip line TL 2) is 1.8mm, the length in the front-rear direction (length of the fifth rectangular microstrip line TL 2) is 5.1mm, the length of the sixth rectangular microstrip TL6 in the left-right direction is 2mm, the length in the front-rear direction is 1.8mm, the angle of the first sector microstrip line is 90 °, the radius is 6mm, the angle of the second sector microstrip line is 90 °, the radius is 6mm, the length of the seventh rectangular microstrip TL7 in the left-right direction is 1mm, the length in the front-rear direction is 11.6mm, the length of the eighth rectangular microstrip TL8 in the left-right direction is 5mm, the length in the front-rear direction is 2.6mm, the length of the ninth rectangular microstrip TL9 in the left-right direction is 1mm, the length in the front-rear direction is 5mm, the length of the tenth rectangular microstrip TL10 in the left-right direction is 1.8mm, the length in the front-rear direction is 11.6mm, the length in the left-right direction of the eleventh rectangular microstrip TL11 is 5mm, the length in the front-rear direction is 1mm, the length in the left-right direction of the twelfth rectangular microstrip TL12 is 2.6mm, the length in the front-rear direction is 5mm, the length in the left-right direction of the thirteenth rectangular microstrip line TL13 is 11.6mm, the length in the front-rear direction is 1mm, the length in the left-right direction of the fourteenth rectangular microstrip line TL14 is 1.8mm, the length in the front-rear direction is 15mm, the length in the left-right direction of the fifteenth rectangular microstrip line TL15 is 0.8mm, the length in the front-rear direction is 1.8mm, the length in the left-right direction of the sixteenth rectangular microstrip line TL16 is 5mm, the length in the front-rear direction is 1.8mm, the length in the left-right direction of the seventeenth rectangular microstrip line TL17 is 1.8mm, the length in the front-rear direction is 15mm, the length in the left-right direction of the eighteenth rectangular microstrip line TL18 is 0.8mm, the length in the front-rear direction is 1.8mm, the length in the left-right direction of the nineteenth rectangular microstrip line TL19 is 3.3mm, the length in the front-rear direction is 1.8mm, the twenty-first rectangular microstrip TL20 has a length in the left-right direction of 3mm, a length in the front-rear direction of 1.8mm, a length in the left-right direction of 1.8mm, a length in the front-rear direction of 5.7mm, a length in the left-right direction of 1.8mm, a length in the front-rear direction of 2.5mm, a length in the left-right direction of 3.3mm, a length in the front-rear direction of 1.8mm, a length in the left-right direction of 3mm, a length in the front-rear direction of 1.8mm, a length in the left-right direction of 1.8mm, a length in the front-rear direction of 5.7mm, a length in the left-right direction of 1.8mm, a length in the front-rear direction of 2.5mm, a length in the twenty-sixth rectangular microstrip TL 26.

The output end of the wide-load dual-polarized rectenna is connected with a load R, simulation tests are carried out on the wide-load dual-polarized rectenna, a return loss and isolation simulation actual measurement diagram of the wide-load dual-polarized rectenna is shown in fig. 6, a radiation pattern of the wide-load dual-polarized rectenna is shown in fig. 7, and an efficiency simulation diagram of the wide-load dual-polarized rectenna is shown in fig. 8. As can be seen from an analysis of fig. 6: the parameters S11, S12, S21 and S22 of the dual-polarized antenna are respectively-20.6 dB, -22dB and-25 dB at the working frequency of 2.45GHz, so that the use requirement of the dual-polarized antenna is met; analysis of fig. 7 shows that: the gain of the dual polarized antenna achieves a maximum of 8dB at 0 deg.. Analysis of fig. 8 shows that: when the input power is 0dBm,5dBm and 10dBm respectively, when the load range is 1000-3000 omega, the rectification efficiency is greater than 50% at the input power of 0dBm, the rectification efficiency is greater than 55% at the input power of 5dBm, and the rectification efficiency is greater than 60% at the input power of 10 dBm. The maximum rectification efficiency of the dual-polarized rectification circuit is 81% when the input power is 10dBm and the load is 2000 ohms.

Claims

1. The utility model provides a wide-load dual-polarized rectenna, includes dual-polarized antenna and dual-polarized rectifier circuit, the dual-polarized antenna is used for receiving the radio frequency microwave signal that the transmitter sent, and will be converted this radio frequency microwave signal to alternating current signal and export to the dual-polarized rectifier circuit, the dual-polarized rectifier circuit is used for will be input its alternating current signal to direct current voltage output for the load power supply, the radio frequency microwave signal is fundamental frequency signal, characterized by the dual-polarized rectifier circuit include harmonic suppression structure, matching circuit, impedance compression circuit and rectifier circuit, the harmonic suppression structure is used for will be the alternating current signal that the dual-polarized antenna export to matching circuit, and will be the second harmonic and the third harmonic that will be produced because the rectifier circuit nonlinearity in the alternating current signal are restrained, avoid second harmonic and third harmonic to return to the dual-polarized antenna and be radiated out and lead to the loss of alternating current energy, the matching circuit is used for carrying out impedance matching to the harmonic suppression structure and the impedance compression circuit, will be the input impedance of impedance compression circuit to 50 omega, and will be the alternating current signal to the output to the compression circuit to the load compression circuit, will not change with the rectifier circuit's the change greatly with the load's the impedance compression circuit's the output of the rectifier circuit;

The dual-polarized antenna is provided with a first output end and a second output end, the harmonic suppression circuit is provided with a first input end, a second input end, a first output end and a second output end, the matching circuit is provided with a first input end, a second input end, a first output end and a second output end, the impedance compression circuit is provided with a first input end, a second input end, a first output end and a second output end, the rectifying circuit is provided with a first input end, a second input end and an output end, the first output end of the dual-polarized antenna is connected with the first input end of the harmonic suppression circuit, the second output end of the dual-polarized antenna is connected with the second input end of the harmonic suppression circuit, the first output end of the harmonic suppression circuit is connected with the first input end of the matching circuit, the second output end of the harmonic suppression circuit is connected with the second input end of the matching circuit, the first output end of the matching circuit is connected with the first input end of the first impedance compression circuit, the first output end of the rectifying circuit is connected with the second input end of the rectifying circuit, and the second output end of the rectifying circuit is connected with the first input end of the rectifying circuit is connected with the second input end of the matching circuit;

The harmonic suppression structure comprises a first rectangular microstrip line, a second rectangular microstrip line, a third rectangular microstrip line, a fourth rectangular microstrip line, a fifth rectangular microstrip line, a sixth rectangular microstrip line, a first fan-shaped microstrip line and a second fan-shaped microstrip line, wherein one end of the first rectangular microstrip line is a first input end of the harmonic suppression structure, the other end of the first rectangular microstrip line is respectively connected with one end of the second rectangular microstrip line, one end of the third rectangular microstrip line and the first fan-shaped microstrip line, the other end of the third rectangular microstrip line is a first output end of the harmonic suppression structure, the second rectangular microstrip line is an open branch line, one end of the fourth rectangular microstrip line is a second input end of the harmonic suppression structure, the other end of the fourth rectangular microstrip line is respectively connected with one end of the fifth rectangular microstrip line, one end of the sixth rectangular microstrip line and the second fan-shaped microstrip line, the other end of the sixth rectangular microstrip line is a second output end of the harmonic suppression structure, the fifth rectangular microstrip line is an open branch node line, the lengths of the second rectangular microstrip line and the fifth rectangular microstrip line are equal, the value range of the second rectangular microstrip line is 0.8λ1 to 1.2λ1, wherein λ1 is a quarter of the wavelength of the second harmonic, the radiuses of the first fan-shaped microstrip line and the second fan-shaped microstrip line are equal, and the value range of the first fan-shaped microstrip line and the second fan-shaped microstrip line is 0.8λ2 to 1.2λ2, wherein λ2 is a quarter of the wavelength of the third harmonic;

The matching circuit comprises a seventh rectangular microstrip line, an eighth rectangular microstrip line, a ninth rectangular microstrip line, a tenth rectangular microstrip line, an eleventh rectangular microstrip line and a twelfth rectangular microstrip line, wherein one end of the seventh rectangular microstrip line is connected with one end of the eighth rectangular microstrip line and the connecting end of the eighth rectangular microstrip line is a first input end of the matching circuit, the other end of the eighth rectangular microstrip line is connected with one end of the ninth rectangular microstrip line and the connecting end of the eighth rectangular microstrip line is a first output end of the matching circuit, the ninth rectangular microstrip line is a short-circuit branch line, one end of the tenth rectangular microstrip line is connected with one end of the eleventh rectangular microstrip line and the connecting end of the eleventh rectangular microstrip line is a second input end of the matching circuit, the other end of the eleventh rectangular microstrip line is connected with one end of the twelfth rectangular microstrip line and the connecting end of the twelfth rectangular microstrip line is a second output end of the matching circuit, and the twelfth rectangular microstrip line is a short-circuit branch line;

the impedance compression circuit comprises a thirteenth rectangular microstrip line, a fourteenth rectangular microstrip line, a fifteenth rectangular microstrip line, a sixteenth rectangular microstrip line, a seventeenth rectangular microstrip line and an eighteenth rectangular microstrip line, wherein one end of the thirteenth rectangular microstrip line is a first input end of the impedance compression circuit, the other end of the thirteenth rectangular microstrip line, one end of the fourteenth rectangular microstrip line and one end of the fifteenth rectangular microstrip line are connected, the other end of the fourteenth rectangular microstrip line is grounded, the other end of the fifteenth rectangular microstrip line is a first output end of the impedance compression circuit, the fourteenth rectangular microstrip line is a short-circuit branch line, one end of the sixteenth rectangular microstrip line is a second input end of the impedance compression circuit, one end of the sixteenth rectangular microstrip line, one end of the seventeenth rectangular microstrip line and one end of the eighteenth rectangular microstrip line are connected, the other end of the seventeenth rectangular microstrip line is grounded, and the other end of the eighteenth rectangular microstrip line is a second output end of the microstrip line of the seventeenth rectangular microstrip line;

The rectification circuit comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first diode, a second diode, a third diode, a fourth diode, a nineteenth rectangular microstrip line, a twenty-first rectangular microstrip line, a twenty-second rectangular microstrip line, a twenty-third rectangular microstrip line, a twenty-fourth rectangular microstrip line, a twenty-fifth rectangular microstrip line and a twenty-sixth rectangular microstrip line; one end of the first capacitor is a first input end of the rectifying circuit, the other end of the first capacitor is connected with one end of the nineteenth rectangular microstrip line, the other end of the nineteenth rectangular microstrip line, the negative electrode of the first diode and the positive electrode of the second diode are connected, the positive electrode of the first diode is grounded, the negative electrode of the second diode is connected with one end of the twentieth rectangular microstrip line, the other end of the twentieth rectangular microstrip line, one end of the twenty first rectangular microstrip line and one end of the twenty second rectangular microstrip line are connected, the other end of the twenty second rectangular microstrip line is connected with one end of the second capacitor, the other end of the second capacitor is grounded, the other end of the twenty-first rectangular microstrip line is connected with one end of the twenty-fifth rectangular microstrip line, the connecting end of the twenty-fifth rectangular microstrip line is the output end of the rectifying circuit, one end of the third capacitor is the second input end of the rectifying circuit, the other end of the third capacitor is connected with one end of the twenty-third rectangular microstrip line, the other end of the twenty-third rectangular microstrip line, the negative electrode of the third diode is connected with the positive electrode of the fourth diode, the positive electrode of the third diode is grounded, the negative electrode of the fourth diode is connected with one end of the twenty-fourth rectangular microstrip line, the other end of the twenty-fifth rectangular microstrip line is connected with one end of the twenty-sixth rectangular microstrip line, the other end of the twenty-sixth rectangular microstrip line is connected with one end of the fourth capacitor, the other end of the fourth capacitor is grounded.

2. The dual polarized rectenna with wide load as claimed in claim 1, wherein the dual polarized rectenna comprises a radiating patch, a first dielectric substrate, a ground patch, a second dielectric substrate, a first feeder and a second feeder, wherein the first dielectric substrate is positioned above the second dielectric substrate with a distance therebetween, the first dielectric substrate and the second dielectric substrate are two rectangular plates with identical dimensions, the front end surface of the first dielectric substrate is flush with the front end surface of the second dielectric substrate, the rear end surface of the first dielectric substrate is flush with the rear end surface of the second dielectric substrate, the left end surface of the first dielectric substrate is flush with the left end surface of the second dielectric substrate, the right end surface of the first dielectric substrate is flush with the right end surface of the second dielectric substrate, the radiating patch is implemented with a first rectangular metal plate, the radiating patch is attached to the upper surface of the first dielectric substrate, the central axis of the radiating patch is coincident with the length of the first rectangular plate, the length of the radiating patch is parallel to the front end surface of the second dielectric substrate, the radiating patch is implemented with the length of the front end surface of the second dielectric substrate, the rear end face of the second dielectric substrate is flush with the rear end face of the grounding patch, the left end face of the second dielectric substrate is flush with the left end face of the grounding patch, the right end face of the second dielectric substrate is flush with the right end face of the grounding patch, two gaps are formed in the grounding patch and are H-shaped, the second dielectric substrate is exposed at the two gaps, the two gaps are respectively called a first gap and a second gap, the first gap and the second gap are symmetrical about the diagonal line of the lower left vertex and the upper right vertex of the grounding patch, the first gap is composed of a first rectangular groove, a second rectangular groove and a third rectangular groove, the first rectangular groove extends along the left-right direction, the second rectangular groove is positioned at the left side of the first rectangular groove, the second rectangular groove is communicated with the first rectangular groove, the symmetry line of the first rectangular groove along the left-right direction is overlapped with the symmetry line of the second rectangular groove along the left-right direction, the third rectangular groove is positioned on the right side of the first rectangular groove, the third rectangular groove and the second rectangular groove are bilaterally symmetrical relative to the first rectangular groove, the symmetry line of the first rectangular groove along the front-back direction is overlapped with the symmetry line of the grounding patch along the front-back direction, the second gap is formed by a fourth rectangular groove, a fifth rectangular groove and a sixth rectangular groove, the fourth rectangular groove extends along the front-back direction, the fifth rectangular groove is positioned on the front side of the fourth rectangular groove and is perpendicular to the fourth rectangular groove, the fifth rectangular groove is communicated with the fourth rectangular groove, the fourth rectangular slot is overlapped with the fifth rectangular slot along the front-back direction, the sixth rectangular slot is positioned at the rear side of the fourth rectangular slot, the sixth rectangular slot and the fifth rectangular slot are symmetrical back and forth relative to the fourth rectangular slot, the fourth rectangular slot is overlapped with the grounding patch along the left-right direction along the symmetry line, the first feeder line and the second feeder line are attached on the lower surface of the second dielectric substrate, the first feeder line and the second feeder line are symmetrical relative to the diagonal line of the left lower vertex and the right upper vertex of the lower surface of the second dielectric substrate, the first feeder line is composed of a twenty-seventh rectangular line and a twenty-eighth rectangular microstrip line, the twenty-seventh rectangular microstrip line extends along the front-back direction, the symmetrical line of the twenty-seventh rectangular microstrip line along the front-rear direction coincides with the symmetrical line of the second dielectric substrate along the front-rear direction, the rear end of the twenty-seventh rectangular microstrip line is connected with one end of the twenty-eighth rectangular microstrip line, the included angle between the rear end of the twenty-seventh rectangular microstrip line and the twenty-eighth rectangular microstrip line is 135 degrees, the twenty-eighth rectangular microstrip line is parallel to the diagonal line of the left lower vertex and the right upper vertex of the lower surface of the second dielectric substrate, the second feeder line consists of the twenty-ninth rectangular microstrip line and the thirty-ninth rectangular microstrip line, the twenty-ninth rectangular microstrip line extends reversely along the left and right direction, the symmetrical line of the twenty-ninth rectangular microstrip line along the left and right direction coincides with the symmetrical line of the second dielectric substrate along the left and right direction, the left end of the twenty-ninth rectangular microstrip line is connected with one end of the thirty-ninth rectangular microstrip line, an included angle between the rear end of the twenty-ninth rectangular microstrip line and the thirty-eighth rectangular microstrip line is 135 degrees, the thirty-eighth rectangular microstrip line is parallel to a diagonal line of a lower left vertex and an upper right vertex of the lower surface of the second dielectric substrate, the other end of the twenty-eighth rectangular microstrip line is a first output end of the dual-polarized antenna, and the other end of the thirty-eighth rectangular microstrip line is a second output end of the dual-polarized antenna.

3. The wide-load dual-polarized rectenna of claim 2, wherein a distance between a front end of the twenty-seventh rectangular microstrip line and a front end of the ground patch is 13.2mm, a length of the twenty-seventh rectangular microstrip line in a left-right direction is 1.8mm, a length of the twenty-eighth rectangular microstrip line in a front-rear direction is 11mm, a length of one end to the other end of the twenty-eighth rectangular microstrip line is 6mm, a length of the twenty-eighth rectangular microstrip line in a diagonal direction of a top left vertex and a bottom right vertex of the second dielectric substrate is 1.8mm, a length of the first rectangular slot in the front-rear direction is 8mm, a length of the first rectangular slot in the left-right direction is 2.2mm, a distance between a front end face of the first rectangular slot and a front end face of the ground patch is 15mm, a length of the second rectangular slot in the front-rear direction is 0.3mm, a length of the twenty-eighth rectangular microstrip line in the left-right direction is 10mm, a length of the radiation length of the eighth rectangular microstrip line in the front-rear direction is 47.035 mm, a thickness of the first dielectric substrate is 0.813mm, a thickness of the first rectangular slot in the front-rear direction is 0.035mm, a thickness of the first rectangular slot is 0.035mm, a thickness of the front-rear substrate is 0mm, a thickness of the front-rear substrate is 0.0350 mm, a length of the front-front end of the first rectangular slot is 0.0350 mm, and a length of the front end of the ground patch is 0 mm; the distance between the first medium substrate and the second medium substrate is 4mm;

The dual-polarized rectifying circuit is arranged on the lower surface of the second dielectric substrate, the harmonic suppression structure, the matching circuit, the impedance compression circuit and the rectifying circuit are sequentially arranged from left to right, the length of the first rectangular microstrip line along the left and right direction is 6mm, the length of the second rectangular microstrip line along the front and rear direction is 1.8mm, the length of the second rectangular microstrip line along the left and right direction (i.e. the width of the second rectangular microstrip line) is 1.8mm, the length of the third rectangular microstrip line along the left and right direction (i.e. the length of the second rectangular microstrip line) is 5.1mm, the length of the third rectangular microstrip line along the left and right direction is 2mm, the length of the fourth rectangular microstrip line along the left and right direction is 1.8mm, the length of the fourth rectangular microstrip line along the left and right direction is 6mm, the length of the fifth rectangular microstrip line along the left and right direction (i.e. the width of the fifth rectangular microstrip line) is 1.8mm, the length along the front-back direction (namely the length of the fifth rectangular microstrip line) is 5.1mm, the length along the left-right direction of the sixth rectangular microstrip line is 2mm, the length along the front-back direction of the sixth rectangular microstrip line is 1.8mm, the angle of the first sector microstrip line is 90 degrees, the radius is 6mm, the angle of the second sector microstrip line is 90 degrees, the radius is 6mm, the length along the left-right direction of the seventh rectangular microstrip line is 1mm, the length along the front-back direction of the seventh rectangular microstrip line is 11.6mm, the length along the left-right direction of the eighth rectangular microstrip line is 5mm, the length along the front-back direction of the eighth rectangular microstrip line is 2.6mm, the length along the left-right direction of the ninth rectangular microstrip line is 1mm, the length along the front-back direction of the ninth rectangular microstrip line is 5mm, the length along the left-right direction of the tenth rectangular microstrip line is 1.8mm, the length along the front-back direction of the eighth rectangular microstrip line is 11.6mm, the length of the eleventh rectangular microstrip line in the left-right direction is 5mm, the length of the twelfth rectangular microstrip line in the front-rear direction is 1mm, the length of the twelfth rectangular microstrip line in the left-right direction is 2.6mm, the length of the thirteenth rectangular microstrip line in the front-rear direction is 5mm, the length of the thirteenth rectangular microstrip line in the left-right direction is 11.6mm, the length of the thirteenth rectangular microstrip line in the front-rear direction is 1mm, the length of the fourteenth rectangular microstrip line in the left-right direction is 1.8mm, the length of the thirteenth rectangular microstrip line in the front-rear direction is 15mm, the length of the fifteenth rectangular microstrip line in the left-right direction is 0.8mm, the length of the sixteenth rectangular microstrip line in the front-rear direction is 1.8mm, the length of the seventeenth rectangular microstrip line in the left-right direction is 1.8mm, the length of the eighteenth microstrip line in the front-rear direction is 1.8mm, the nineteenth rectangular microstrip line has a length of 3.3mm in the left-right direction, a length of 1.8mm in the front-rear direction, the twenty-fourth rectangular microstrip line has a length of 3mm in the left-right direction, a length of 1.8mm in the front-rear direction, a length of 1.8mm in the left-right direction, a length of 5.7mm in the front-rear direction, a length of 1.8mm in the left-right direction, a length of 2.5mm in the front-rear direction, a length of 3.3mm in the left-right direction, a length of 1.8mm in the front-rear direction, a length of 3mm in the front-rear direction, a length of 1.8mm in the left-right direction, a length of 5.7mm in the front-rear direction, a length of 1.8mm in the left-right direction, a length of the twenty-fourth rectangular microstrip line, the length in the front-rear direction was 2.5mm.