CN112103671A - Microwave wireless energy receiving system - Google Patents
Microwave wireless energy receiving system Download PDFInfo
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- CN112103671A CN112103671A CN202010973900.XA CN202010973900A CN112103671A CN 112103671 A CN112103671 A CN 112103671A CN 202010973900 A CN202010973900 A CN 202010973900A CN 112103671 A CN112103671 A CN 112103671A
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- wireless energy
- receiving system
- energy receiving
- microwave wireless
- pass filter
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- 230000005855 radiation Effects 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims description 12
- 239000000758 substrate Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 description 18
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000000670 limiting effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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Abstract
The invention relates to a microwave wireless energy receiving system, and belongs to the technical field of antennas. The system comprises a microwave receiving array antenna, a low-pass filter, a load matching circuit, a rectifier diode and a through filter. The microwave receiving array antenna is formed by connecting 4 x 4 designed microstrip patch antennas in series and in parallel, can achieve larger gain under smaller size, and the gain at the position of the maximum radiation direction reaches 19.6 dBi. The designed low-pass filter can obviously inhibit harmonic waves above the second order, the designed voltage-doubling rectifying circuit can output higher voltage under higher output efficiency, and the whole system can smoothly output direct current, so that the wireless power supply system is suitable for the requirement of wireless power supply of sensing nodes in the field of Internet of things.
Description
Technical Field
The invention belongs to the technical field of antennas, and relates to a microwave wireless energy receiving system.
Background
In recent years, in order to solve the power supply problems of special occasions such as energy shortage, islands, remote mountainous and villages and the like and the frequent replacement problem of batteries of monitoring devices in the field of internet of things, the microwave wireless power transmission technology is more and more widely concerned. The microwave wireless power transmission takes air as a medium and electromagnetic waves as an energy carrier, and energy transmission is carried out through a receiving and transmitting antenna. Compared with the traditional power transmission line, the power transmission line can save cost and simplify power transmission equipment. It has found wide application in a number of fields. Such as human medical equipment, robot wireless energy supply, solar space station, sensor wireless energy supply and the like.
In 1899, Nikola Tesla completes the first microwave wireless power transmission test in human history, and therefore, the door of a wireless power transmission technology is opened. In 1964, the american engineer William c.brown invented a receiving rectenna for powering helicopters, reaching an output power of 270W. In 2001, power transmission of 10kW is successfully realized in France in Neissan island, and bulbs outside 40m are turned on. In 2015, japanese scientists successfully realized accurate transmission of 1.8kW of electric energy to a receiving device outside 55m, and hopefully, a solar space station was built after 2040 years, solar energy in the space was collected and converted into electric energy, and the electric energy is transmitted to the earth through electromagnetic waves, so as to solve the problem of energy shortage of the earth.
Disclosure of Invention
In view of the above, the present invention provides a microwave wireless energy receiving system. The microwave wireless energy receiving system consists of a 4 x 4 microstrip patch array antenna, a low-pass filter, a voltage doubling rectifying circuit, a straight-through filter and an impedance matching circuit.
In order to achieve the purpose, the invention provides the following technical scheme:
a microwave wireless energy receiving system comprises an array antenna, a low-pass filter, an impedance matching circuit, a rectifying circuit and a through filter which are connected in sequence;
the array antenna is a 4-by-4 microstrip patch antenna, the microstrip patch antenna is formed by combining in a series-parallel combination mode, the structure is a three-layer structure, the uppermost layer is a metal patch, the middle layer is a dielectric substrate, and the bottommost layer is a metal grounding plate.
Optionally, the size of the metal patch is 16.3 × 21.5mm2Feeding by adopting a microstrip line side feeding mode;
the dielectric substrate is made of Rogers5880 with the size of 30 x 40 x 1mm3；
The thickness of the metal grounding plate is 0.05 mm;
optionally, the size of the array antenna is 150 × 150 × 1mm3The gain at the maximum radiation direction is 19.6 dBi.
Optionally, the size of the microstrip patch antenna is 30 × 40 × 1mm3The gain at the maximum radiation direction is 8.3dBi, and the feeding mode is side feeding.
Optionally, the rectifier circuit is a first-order voltage-doubling rectifier circuit.
Optionally, the pass filter is a tenth order butterworth low pass filter.
The invention has the beneficial effects that:
firstly, the receiving antenna adopts a microstrip patch antenna combined in series and parallel, so that higher gain can be realized under a smaller size, and the characteristic of the invention that the receiving antenna is suitable for wireless energy supply of the sensor in the field of Internet of things is not influenced.
Secondly, the high-order harmonic generator has a high-order harmonic and suppression function, and rectification efficiency is improved.
Thirdly, the invention can keep higher energy receiving efficiency under the transmission distance of about 3.5 m.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a block diagram of a microwave wireless energy receiving system;
fig. 2 is a microstrip patch antenna constituting a receiving array antenna;
FIG. 3 is a block diagram of a microwave receiving array antenna;
FIG. 4 is a gain diagram of a microwave receiving array antenna;
fig. 5 is a ten-step butterworth low pass filter prototype circuit.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
The structure diagram of the microwave infinite energy receiving system is shown in figure 1 and consists of an array antenna, a low-pass filter, an impedance matching circuit, a rectifying circuit and a through filter.
The microwave receiving antenna is an array antenna, the array antenna is formed by combining microstrip patch antennas 2 in a series-parallel combination mode, the unit structure of the microstrip patch antennas is as shown in figure 2, the structure of the microstrip patch antennas is a sandwich structure, the uppermost layer is a metal patch, the middle layer is a dielectric substrate, and the bottommost layer is a metal grounding plate. The size of the metal patch is 16.3X 21.5mm2Feeding is carried out in a microstrip line side feeding mode. The intermediate medium substrate is made of Rogers5880 with the size of 30 × 40 × 1mm3. The bottom layer is typically a metal ground plate with a thickness of 0.05 mm. The gain at the maximum radiation direction of the microstrip patch antenna designed in the invention is 8.3 dBi.
The array antenna shown in fig. 3 is formed by connecting 4 x 4 microstrip patch antennas 2 in series and parallel, 4 microstrip patch antennas are connected in series in the vertical direction, the width of the series microstrip line 3 is 1.3mm, and each group of the microstrip patch antennas connected in series is connected in parallel through a Wilkinson power divider 1 to form the array antenna. Compared with a single microstrip patch antenna unit, the gain at the maximum radiation direction reaches 19.6dBi as shown in figure 4, the gain of the receiving antenna is greatly improved, and the size is 150 multiplied by 1mm3The wireless energy supply system is suitable for the wireless energy supply field of the sensing nodes of the Internet of things.
The low-pass filter plays a role of restraining higher harmonics by passing fundamental waves, and is installed between the receiving array antenna and the rectifying circuit. According to the working frequency of 5.8GHz, the order of the designed low-pass filter is 10, and the circuit schematic diagram is shown in FIG. 5. The amplitudes of the transmission coefficient S21 of the low-pass filter designed according to actual measurement at 5.8GHz, 11.6GHz, 17.4GHz and 23.2GHz are respectively 0.909, 0.05, 0.002 and 0.001, so that the low-pass filter has a good inhibiting effect on high-order waves and has a good transmission effect on fundamental waves.
The invention adopts the printed microstrip line to design the impedance matching circuit, and has the advantages of small volume, simple structure and convenient processing. The designed single-branch impedance matching circuit enables the low-pass filter to be matched with the load of the rectifying circuit. The reflection coefficient S11 is-44.578 dB and the transmission coefficient S21 is-0.44 dB at the working frequency of 5.8GHz, which shows that the insertion loss of the matching circuit is low, the loss of conversion efficiency cannot be caused, a good matching effect is achieved, and the energy is prevented from being reflected and wasted.
When the transmission distance is 2-6 m and the input power of the rectifying circuit is about 5-16 dBm, the HSMS-286x series diodes have higher rectifying efficiency, so the HSMS-286x series diodes are finally selected as the rectifying diodes of the rectifying circuit, and the rectifying circuit adopts a first-order voltage doubling rectifying circuit.
The invention adopts a quarter-wavelength microstrip transmission line connected in parallel with a grounding capacitor as a through filter to further improve the rectification drop rate.
The microwave wireless energy receiving system designed by the invention realizes 51.3% of working efficiency under the condition that the transmission distance is 3.5m, has a good effect and has certain advantages in the transmission distance.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (6)
1. A microwave wireless energy receiving system, characterized by: the antenna comprises an array antenna, a low-pass filter, an impedance matching circuit, a rectifying circuit and a through filter which are connected in sequence;
the array antenna is a 4-by-4 microstrip patch antenna, the microstrip patch antenna is formed by combining in a series-parallel combination mode, the structure is a three-layer structure, the uppermost layer is a metal patch, the middle layer is a dielectric substrate, and the bottommost layer is a metal grounding plate.
2. A microwave wireless energy receiving system according to claim 1, characterized in that: the size of the metal patch is 16.3 mm multiplied by 21.5mm2Feeding by adopting a microstrip line side feeding mode;
the dielectric substrate is made of Rogers5880 with the size of 30 x 40 x 1mm3；
The thickness of the metal grounding plate is 0.05 mm.
3. A microwave wireless energy receiving system according to claim 1, characterized in that: the size of the array antenna is 150 multiplied by 1mm3The gain at the maximum radiation direction is 19.6 dBi.
4. A microwave wireless energy receiving system according to claim 3, wherein: the size of the microstrip patch antenna is 30 multiplied by 40 multiplied by 1mm3Gain at maximum radiation direction of 8.3dBi, power feeding sideThe formula is side feeding.
5. A microwave wireless energy receiving system according to claim 1, characterized in that: the rectification circuit is a first-order voltage-multiplying rectification circuit.
6. A microwave wireless energy receiving system according to claim 1, characterized in that: the pass filter is a tenth order butterworth low pass filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010973900.XA CN112103671A (en) | 2020-09-16 | 2020-09-16 | Microwave wireless energy receiving system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010973900.XA CN112103671A (en) | 2020-09-16 | 2020-09-16 | Microwave wireless energy receiving system |
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| CN112103671A true CN112103671A (en) | 2020-12-18 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110031817A1 (en) * | 2009-08-06 | 2011-02-10 | Electronics And Telecommunications Research Institute | Rectifying antenna array |
| CN102354805A (en) * | 2011-06-22 | 2012-02-15 | 高宝强 | Rectenna array for microwave reception |
| CN103311646A (en) * | 2013-05-13 | 2013-09-18 | 吉林大学 | Rectenna based on microwave photonic crystal structure |
| CN105006894A (en) * | 2015-06-11 | 2015-10-28 | 重庆大学 | Wireless charging system of wireless sensor network |
| CN107968257A (en) * | 2017-11-27 | 2018-04-27 | 电子科技大学 | A kind of voltage multiplying rectifier antenna with harmonic restraining function |
| CN110098669A (en) * | 2019-05-16 | 2019-08-06 | 中国舰船研究设计中心 | A kind of microwave wireless electric energy transmitting device based on salt free ligands phase-modulation |
| CN110112546A (en) * | 2019-04-17 | 2019-08-09 | 电子科技大学 | A kind of 2450MHz reception rectenna array antenna |
-
2020
- 2020-09-16 CN CN202010973900.XA patent/CN112103671A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110031817A1 (en) * | 2009-08-06 | 2011-02-10 | Electronics And Telecommunications Research Institute | Rectifying antenna array |
| CN102354805A (en) * | 2011-06-22 | 2012-02-15 | 高宝强 | Rectenna array for microwave reception |
| CN103311646A (en) * | 2013-05-13 | 2013-09-18 | 吉林大学 | Rectenna based on microwave photonic crystal structure |
| CN105006894A (en) * | 2015-06-11 | 2015-10-28 | 重庆大学 | Wireless charging system of wireless sensor network |
| CN107968257A (en) * | 2017-11-27 | 2018-04-27 | 电子科技大学 | A kind of voltage multiplying rectifier antenna with harmonic restraining function |
| CN110112546A (en) * | 2019-04-17 | 2019-08-09 | 电子科技大学 | A kind of 2450MHz reception rectenna array antenna |
| CN110098669A (en) * | 2019-05-16 | 2019-08-06 | 中国舰船研究设计中心 | A kind of microwave wireless electric energy transmitting device based on salt free ligands phase-modulation |
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Application publication date: 20201218 |
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