CN110112556B - Multifunctional radio frequency device with dual-polarized patch antenna and filter fused - Google Patents
Multifunctional radio frequency device with dual-polarized patch antenna and filter fused Download PDFInfo
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- CN110112556B CN110112556B CN201910412240.5A CN201910412240A CN110112556B CN 110112556 B CN110112556 B CN 110112556B CN 201910412240 A CN201910412240 A CN 201910412240A CN 110112556 B CN110112556 B CN 110112556B
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- 239000000758 substrate Substances 0.000 claims abstract description 49
- 230000005855 radiation Effects 0.000 claims abstract description 23
- 230000003071 parasitic effect Effects 0.000 claims abstract description 22
- 239000010410 layer Substances 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 11
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000004088 simulation Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005388 cross polarization Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
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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
-
- 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
-
- 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
Abstract
The invention discloses a multifunctional radio frequency device with a dual-polarized patch antenna and a filter integrated, which comprises three layers of dielectric plates, wherein a parasitic patch is arranged on the upper surface of a top dielectric substrate; the upper surface of the middle layer medium substrate is provided with a radiation patch, the lower surface of the middle layer medium substrate is provided with a cross feeder, and the tail end of the cross feeder is connected with the radiation patch; the upper surface of the bottom dielectric substrate is provided with a floor, the lower surface of the bottom dielectric substrate is provided with a short circuit branch node line and a matching network, and the short circuit branch node line and a cross-shaped feeder line form a band-pass filter; the parasitic patch, the radiation patch and the cross-shaped feeder line form a dual-polarized antenna; the dual-polarized band-pass filter has two working modes, namely the dual-polarized antenna and the band-pass filter, the working modes can be adjusted according to the needs without changing the circuit structure, and the two working modes are independent.
Description
Technical Field
The invention relates to the field of antenna research in the field of wireless mobile communication, in particular to a multifunctional radio frequency device with a dual-polarized patch antenna and a filter integrated.
Background
As research into next generation intelligent systems and automation equipment proceeds, more and more eyes are beginning to be directed to reconfigurable devices. The reconfigurable device can be combined with a programmable element to realize a controllable multimode working mode, so that multiple functions of the system can be realized, the number of used system devices can be reduced, and the miniaturization effect of the system can be realized.
Filters and antennas are two important components of the radio frequency front end, and researchers have put a lot of effort on the reconfigurable research of filters and antennas. The reconfigurable filter comprises that the working frequency of the filter is switchable, the bandwidth is adjustable and the like; the reconfiguration of the antenna comprises reconfiguration of a radiation mode of the antenna, switching of an operating mode, switching of an operating frequency and the like. However, these works only implement a single function (filter or antenna), and do not break through the kinds of functions.
Now, a filter and an antenna are fused and designed, and a filter and an antenna function reconfigurable device/multifunctional device which can serve as both a filter and an antenna are designed. As in the design of a filter antenna, the radiator of the antenna is also a resonator, which can also be used when designing filters and antenna function reconfigurable/multifunction devices. The filter antenna is designed by replacing the last-stage resonator of the filter with the antenna, and removing the port of the filter connected with the last-stage resonator and the input port of the antenna; when the filter and the antenna function reconfigurable device/multifunctional device are designed, the antenna is used as a first-stage resonator in the middle of the filter, all ports of the filter are reserved, and even input ports of the antenna are reserved. Thus, by selecting different work ports, it is possible to work in filter or antenna modes, respectively. That is, such a device performs both the functions of a filter and an antenna.
Some multifunctional microwave elements or devices with programmable microwave elements have been developed at the present stage, and the prior literature describes that by using a dual-function cavity resonator, a two-in-one design of filter and antenna integration is proposed, filtering and radiation operation of three different frequency bands are realized, but the bandwidth is only 0.33%; there are also literature applications where patches or dielectric resonators are used as radiators and filters of the same frequency, the radiators having only monopolar applications; also in these designs, the filter and antenna share a resonator, so that their center frequencies or bandwidths cannot be tuned independently, and their antennas cannot perform dual polarization operation within the same frequency.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention provides a multifunctional radio frequency device with a dual-polarized patch antenna and a filter integrated.
The device has two working modes of a dual-polarized antenna and a band-pass filter, the working modes can be adjusted according to the needs without changing the circuit structure, and the two working modes are independent.
The invention adopts the following technical scheme:
a dual-polarized patch antenna and filter integrated multifunctional radio frequency device comprises three layers of dielectric substrates, namely a top dielectric substrate, a middle dielectric substrate and a bottom dielectric substrate from top to bottom;
a parasitic patch is arranged on the upper surface of the top dielectric substrate;
the upper surface of the middle layer medium substrate is provided with a radiation patch, the lower surface of the middle layer medium substrate is provided with a cross feeder, and the tail end of the cross feeder is connected with the radiation patch;
the upper surface of the bottom medium substrate is provided with a floor, the lower surface of the bottom medium substrate is provided with a short circuit branch line and a matching network, one end of the short circuit branch line is connected in parallel with one end of the matching network, which is close to the center of the bottom medium substrate, the other end of the short circuit branch line is connected with the floor, and the matching network penetrates through the bottom medium substrate and is connected with a cross-shaped feeder through a metal wire;
the short circuit branch node line and the cross-shaped feeder line form a band-pass filter;
the parasitic patch, the radiating patch and the cross-shaped feeder line form a dual-polarized antenna.
The radiating patch and the parasitic patch are symmetrical structures, and the symmetrical structures comprise squares or circles. The short circuit branch node line is a quarter wavelength of the working frequency of the band-pass filter.
The length of the transverse branch or the length of the longitudinal branch of the cross-shaped feeder is one quarter wavelength of the working frequency of the band-pass filter.
The matching network is formed by sequentially connecting four sections of microstrip lines with different widths, and the tail end is a port.
The floor is a square metal patch.
The cross-shaped intersection point of the cross-shaped feeder line is the center point of the medium substrate of the middle layer.
The parasitic patch and the radiating patch generate a pair of poles that control the passband of the antenna;
the cross-shaped feeder line and the short-circuit branch node line generate a pair of poles for controlling the passband of the filter;
the two pairs of poles are independent of each other.
Compared with the prior art, the invention has the following beneficial effects:
1. the multifunctional radio frequency device with the dual-polarized patch antenna and the filter integrated can be used as a dual-polarized antenna and a filter, and has the characteristic of functional reconfigurability.
2. The invention relates to a multifunctional radio frequency device integrating a dual-polarized patch antenna and a filter, which can control the center frequency of the filter by adjusting the length of a cross feeder and the length of a bottom short-circuit branch node line and control the center working frequency of the antenna by adjusting the side lengths of a parasitic patch and a radiation patch.
3. According to the multifunctional radio frequency device integrating the dual-polarized patch antenna and the filter, the parasitic patch and the radiation patch have little influence on the frequency of the filter, the lengths of the cross feeder line and the bottom short-circuit branch node line have little influence on the working frequency of the antenna, the working modes of the filter and the antenna can be selected according to the requirement, and the design of the dual-functional component is promoted.
Drawings
FIG. 1 is a split block diagram of the present invention;
FIG. 2 is a side view of the present invention;
fig. 3 (a) and 3 (b) are reverse and front side structures of the top dielectric substrate of the present invention;
FIGS. 4 (a) and 4 (b) are reverse and front side block diagrams of an interlayer dielectric substrate of the present invention;
fig. 5 (a) and 5 (b) are reverse and front side structures of the underlying dielectric substrate of the present invention;
FIG. 6 is a graph of S-parameter simulation results at different frequencies when the parasitic patch edge length is changed in an embodiment of the present invention;
FIG. 7 is a graph showing simulation results of S-parameters at different frequencies when changing the side length of a radiating patch in an embodiment of the present invention;
FIG. 8 is a graph of S-parameter simulation results at different frequencies for varying the length of a cross-shaped feeder in an embodiment of the present invention;
FIG. 9 is a graph of the results of measurements and simulations of actual gain at different frequencies in an embodiment of the present invention;
FIG. 10 is a graph showing the results of measurement and simulation of S parameters at different frequencies in an embodiment of the present invention;
FIG. 11 is a graph of E-plane measurement and simulated radiation patterns for exciting only one port at a center operating frequency of 2.4GHz in accordance with an embodiment of the present invention;
FIG. 12 is a graph of H-plane measurement and simulated radiation patterns for exciting only one port at a center operating frequency of 2.4GHz in accordance with an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but embodiments of the present invention are not limited thereto.
Examples
As shown in fig. 1, fig. 2, fig. 3 (a) and fig. 3 (b), fig. 4 (a) and fig. 4 (b), fig. 5 (a) and fig. 5 (b), a dual-polarized patch antenna and a filter are integrated into a multifunctional radio frequency device, which is a dual-port device, can realize two functions of the filter and the dual-polarized antenna simultaneously without changing a circuit structure, and has different working frequencies of the filter and the antenna and can be controlled independently.
The three-layer dielectric substrate comprises a top dielectric substrate 2, a middle dielectric substrate 5 and a bottom dielectric substrate 8 which are sequentially arranged from top to bottom, wherein the center points of the three dielectric substrates are on the same vertical line, and the interval between the top dielectric substrate and the bottom dielectric substrate is larger than the interval between the middle dielectric substrate and the bottom dielectric substrate.
The upper surface of the top layer dielectric substrate 2 is provided with a square parasitic patch 1, and the center point of the parasitic patch is the center point of the top layer dielectric substrate.
The upper surface of the middle layer dielectric substrate 5 is provided with a square radiation patch 3, the lower surface of the middle layer dielectric substrate is provided with a cross feeder 6, and the tail end of the cross feeder is connected with the radiation patch through a metal via 4; the intersection point of the cross-shaped feeder lines and the center point of the radiation patch are both the center points of the interlayer dielectric substrate.
The radiation patch and the parasitic patch can be square metal sheets or have other symmetrical structures such as a round shape.
The cross feeder is formed by vertically crossing transverse branches and longitudinal branches, the cross feeder is of a structure with axisymmetric and centrosymmetric characteristics, the width of the cross feeder can be uniform, the width of the cross feeder can also be different from the width of the middle of the cross feeder at two ends of the transverse branches, and metal through holes are formed at two ends of the longitudinal branches. In this embodiment, the transverse branches and the longitudinal branches have a structure with a narrow middle and wide two sides. The structure of the cross-shaped feeder line is located directly below the radiating patch to enhance port isolation in the antenna operating mode.
The upper surface of bottom dielectric substrate 8 sets up a square metal paster and regard as floor 7, and its lower surface sets up short circuit branch festival line 12, matching network 9 and device port, and the one end of short circuit branch festival line connects in parallel in the one end that the matching network is close to bottom dielectric plate central point put, and this embodiment has two device ports, matching network and short circuit branch festival line are two, the other end of short circuit branch festival line is terminal to be connected with the floor through metal via 11, the one end that the matching network 9 is close to bottom dielectric substrate central point put passes bottom dielectric substrate and upwards extends through metal wire 10 and be connected with cross feeder.
The matching network can realize the matching of the band-pass filter and the dual-polarized antenna at the same time, and is formed by sequentially connecting four sections of microstrip lines 13, 14, 15 and 16 with different widths, the tail end of the microstrip line 16 is a port, and the two device ports are respectively positioned at the midpoints of adjacent right-angle sides of the bottom dielectric substrate. The two device ports correspond to two matching networks, two short circuit branch node lines and two metal vias.
The short circuit branch node line and the cross feeder line realize a band-pass filter working mode;
the parasitic patch, the radiation patch and the cross feeder realize an antenna working mode;
the frequency of the antenna operation mode can be adjusted by adjusting the dimensions of the radiating patch 3 and the parasitic patch 1, without affecting the operation frequency of the filter.
The length of the cross-shaped feeder line 6 and the length of the short-circuit branch node line 12 are adjusted, so that the frequency of the working mode of the filter can be adjusted without affecting the frequency of the working mode of the antenna.
The length of the cross-shaped feed line 6 in the transverse or longitudinal direction is approximately the equivalent of a quarter wavelength of the filter operating frequency.
The length of the short stub 12 is approximately one quarter wavelength equivalent to the filter operating frequency.
The multifunctional radio frequency device with the dual-polarized patch antenna and the filter integrated is characterized in that a pair of poles of a control filter passband generated by a cross feeder line and a short-circuit branch line and a pair of poles of the control antenna passband generated by a parasitic patch and a radiation patch are mutually independent, the radiation function of the dual-polarized antenna and the circuit function of the filter can be selectively realized, and the reconfigurability of the device is reflected.
Referring to fig. 6, a simulation of an S-frequency plot when varying the parasitic patch side length in an embodiment of the present invention is shown. It can be seen that in this embodiment, a pole can be generated in the low frequency passband, i.e. the antenna operating band, by controlling the square parasitic patch side length, and changing the parasitic patch side length has a negligible effect on the pole in the high frequency passband, i.e. the filter operating band, but a certain effect on the other pole of the low frequency passband. It can be seen that the influence between the antenna related parameters and the filter related parameters is negligible. It can also be seen that the two modes of operation of the antenna and the filter are independent of each other.
Referring to fig. 7, a simulation of the S-frequency curve when changing the side length of a radiating patch in an embodiment of the present invention is shown. It can be seen that in this embodiment, by controlling the radiating patch side length, a pole can be generated in the low frequency passband, i.e. the antenna operating band, and changing the radiating patch side length has a negligible effect on the pole in the high frequency passband, i.e. the filter operating band, but a certain effect on the other pole of the low frequency passband. It can be seen that the influence between the antenna related parameters and the filter related parameters is negligible. It can also be seen that the two modes of operation of the antenna and the filter are independent of each other.
Referring to FIG. 8, a simulation of the S-frequency curve when changing a cross-shaped feeder in one embodiment of the invention is shown. It can be seen that in this embodiment, one pole can be created in the high frequency passband by controlling the cross-shaped feeder length, and changing the cross-shaped feeder length has negligible effect on the pole in the low frequency passband. It can be seen that the influence between the antenna related parameters and the filter related parameters is negligible. It can also be seen that the two modes of operation of the antenna and the filter are independent of each other.
Referring to fig. 9, a graph of actual gain curve versus frequency for individual port excitation is shown in accordance with an embodiment of the present invention. It can be seen that the simulated and tested impedance bandwidths are substantially 2.23-2.55GHz and 3.66-3.86GHz. It can be seen that the simulation result S and the test result S have good consistency.
Referring to FIG. 10, a graph of the results of measurements and simulations of S11-frequency, S12-frequency, and S22-frequency in one embodiment of the present invention is shown. The results of the simulation and the test of S11 and S22 can be seen to have good consistency, and the independence of 2 ports is reflected. It can be seen that when S11/S22 has a larger value, S21 has a smaller value, which means that the 2 ports in the passband have a stronger isolation, and the two ports have smaller mutual influence. It can also be seen that the simulation results and the test results have good consistency.
Referring to fig. 11, which is a graph of measured and simulated radiation patterns exciting only one port at a center operating frequency of 2.4GHz in one embodiment of the invention, it can be seen that low cross-polarization levels of less than 20dB are achieved in the E-plane.
Referring to fig. 12, which is a graph of measured and simulated radiation patterns exciting only one port at a center operating frequency of 2.4GHz in one embodiment of the invention, it can be seen that a low cross-polarization level of less than 15dB is achieved in the H-plane.
The embodiments described above are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the embodiments described above, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principles of the present invention should be made in the equivalent manner, and are included in the scope of the present invention.
Claims (5)
1. A dual-polarized patch antenna and filter integrated multifunctional radio frequency device is characterized by comprising three layers of dielectric substrates, namely a top dielectric substrate, a middle dielectric substrate and a bottom dielectric substrate from top to bottom;
a parasitic patch is arranged on the upper surface of the top dielectric substrate;
the upper surface of the middle layer medium substrate is provided with a radiation patch, the lower surface of the middle layer medium substrate is provided with a cross feeder, and the tail end of the cross feeder is connected with the radiation patch;
the upper surface of the bottom medium substrate is provided with a floor, the lower surface of the bottom medium substrate is provided with a short circuit branch node line and a matching network, one end of the short circuit branch node line is connected with the matching network, the other end of the short circuit branch node line is connected with the floor, and the matching network penetrates through the bottom medium substrate and is connected with a cross-shaped feeder line through a metal wire;
the short circuit branch node line and the cross-shaped feeder line form a band-pass filter;
the parasitic patch, the radiation patch and the cross-shaped feeder line form a dual-polarized antenna;
the short circuit branch node line is a quarter wavelength of the working frequency of the band-pass filter;
the length of the transverse branch or the length of the longitudinal branch of the cross-shaped feeder is one quarter wavelength of the working frequency of the band-pass filter;
the parasitic patch and the radiating patch generate a pair of poles that control the passband of the antenna;
the cross-shaped feeder line and the short-circuit branch node line generate a pair of poles for controlling the passband of the filter;
the two pairs of poles are independent of each other.
2. The multifunctional radio-frequency device according to claim 1, wherein the radiating patch and parasitic patch are symmetrical structures, the symmetrical structures comprising square or circular shapes.
3. The multifunctional radio frequency device according to claim 1, wherein the matching network is formed by sequentially connecting four sections of microstrip lines with different widths, and the tail end is a port.
4. The multi-function rf device of claim 1 wherein the floor is a square metal patch.
5. The multifunctional radio-frequency device according to claim 1, wherein the cross-shaped intersection of the cross-shaped feed lines is the center point of the interlayer dielectric substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910412240.5A CN110112556B (en) | 2019-05-17 | 2019-05-17 | Multifunctional radio frequency device with dual-polarized patch antenna and filter fused |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910412240.5A CN110112556B (en) | 2019-05-17 | 2019-05-17 | Multifunctional radio frequency device with dual-polarized patch antenna and filter fused |
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| Publication Number | Publication Date |
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| CN110112556A CN110112556A (en) | 2019-08-09 |
| CN110112556B true CN110112556B (en) | 2024-01-19 |
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| CN201910412240.5A Active CN110112556B (en) | 2019-05-17 | 2019-05-17 | Multifunctional radio frequency device with dual-polarized patch antenna and filter fused |
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| CN112688079A (en) * | 2020-12-21 | 2021-04-20 | 华南理工大学 | Dual-polarized wide beam antenna based on loading bent grounding metal column |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1636299A (en) * | 2001-09-24 | 2005-07-06 | 塔莱斯荷兰公司 | Patch fed printed antenna |
| CN101273491A (en) * | 2005-07-12 | 2008-09-24 | 欧洲Gnss监督管理局 | Multi-band antenna for satellite positioning system |
| CN108847521A (en) * | 2018-05-04 | 2018-11-20 | 杭州电子科技大学 | Broadband fed microstrip filter antenna |
| CN209948041U (en) * | 2019-05-17 | 2020-01-14 | 华南理工大学 | Multifunctional radio frequency device with dual-polarized patch antenna and filter integrated |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6567048B2 (en) * | 2001-07-26 | 2003-05-20 | E-Tenna Corporation | Reduced weight artificial dielectric antennas and method for providing the same |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1636299A (en) * | 2001-09-24 | 2005-07-06 | 塔莱斯荷兰公司 | Patch fed printed antenna |
| CN101273491A (en) * | 2005-07-12 | 2008-09-24 | 欧洲Gnss监督管理局 | Multi-band antenna for satellite positioning system |
| CN108847521A (en) * | 2018-05-04 | 2018-11-20 | 杭州电子科技大学 | Broadband fed microstrip filter antenna |
| CN209948041U (en) * | 2019-05-17 | 2020-01-14 | 华南理工大学 | Multifunctional radio frequency device with dual-polarized patch antenna and filter integrated |
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