CN111755809A - Miniaturized dual-polarized broadband Fabry-Perot resonant cavity antenna - Google Patents
Miniaturized dual-polarized broadband Fabry-Perot resonant cavity antenna Download PDFInfo
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- CN111755809A CN111755809A CN202010748652.9A CN202010748652A CN111755809A CN 111755809 A CN111755809 A CN 111755809A CN 202010748652 A CN202010748652 A CN 202010748652A CN 111755809 A CN111755809 A CN 111755809A
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052802 copper Inorganic materials 0.000 claims abstract description 27
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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
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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
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
- H01Q15/242—Polarisation converters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
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Abstract
The invention relates to a miniaturized dual-polarized broadband Fabry-Perot resonant cavity antenna, which comprises: the antenna comprises a square patch antenna, a feed network arranged below the square patch antenna and a reflecting cover plate arranged above the square patch antenna; wherein, the feed network includes: the upper surface of the first dielectric substrate is coated with copper to form a Y-shaped first microstrip line; the lower surface of the second dielectric substrate is coated with copper to form a Y-shaped second microstrip line, and the second microstrip line and the first microstrip line are arranged vertically; the grounding plate is arranged between the first dielectric substrate and the second dielectric substrate; the square patch antenna is a third dielectric substrate with one copper-clad surface; the reflecting cover plate is a single-layer fourth dielectric substrate with copper coated on both sides. The invention has the characteristics of dual polarization, high gain, wide frequency band and miniaturization.
Description
Technical Field
The invention relates to a Fabry-Perot (FP) resonant cavity antenna, in particular to a miniaturized dual-polarized broadband FP resonant cavity antenna, and belongs to the technical field of resonant cavity antennas for communication.
Background
At present, with the rapid development of wireless communication technology, the requirements for directional antennas are becoming stricter and stricter, especially in the microwave and millimeter wave frequency bands. The conventional techniques for realizing high gain of the antenna include: loading a reflector, a dielectric prism, a waveguide horn and a microstrip antenna array; however, these structures have the limitations of high cost and complicated design. In recent decades, the application of Electromagnetic Band-Gap (EBG) structures in suppressing Electromagnetic waves has attracted much attention, and one important application is a high-gain Fabry-perot (FP) cavity antenna, which is also known as an EBG cavity antenna.
In a traditional resonant cavity antenna, an EBG structure is used as a Partially Reflective Surface (PRS), the conventional resonant cavity antenna is placed above a ground plane at a certain distance, an air cavity is formed between the Partially reflective surface and the ground plane, and the main performance of the antenna is determined by the attribute of the PRS through feeding of a single antenna or an antenna array. The EBG resonant cavity antenna is a typical narrow-band resonant cavity antenna, and has a narrow bandwidth. In order to improve the bandwidth of the antenna, the array antenna can be used for feeding instead of a single antenna, but the complicated feeding network design brings difficulty to the antenna design. It is also possible to increase the bandwidth of the resonator antenna by using a high-impedance surface and a single layer of frequency selective surface as the ground plane and the partially reflecting surface, respectively.
In 2005, Fereidis et al successfully reduced the resonator antenna height to one quarter of the operating wavelength by overlaying AMC (Artificial Magnetic Conductor) around a planar feed antenna. In 2014, Debogovic placed a partially reflecting plate PRS over an array formed by two planar antennas, achieving independent wave velocity scanning and lobe size control. In 2013, a conformal Fabry-Perot cavity antenna appeared. In 2014, the Fabry-Perot antenna realizes the function of converting the feed linear polarization mode into the integral circular polarization of the antenna. Through the development of the years, the Fabry-Perot resonant cavity antenna realizes a plurality of functions; however, the 3dB gain bandwidth of the conventional Fabry-Perot cavity antenna is very low, and the 3dB gain bandwidth of the Fabry-Perot cavity antenna in the research literature does not exceed 2%.
In order to solve the narrow band characteristic of the conventional Fabry-Perot resonant cavity Antenna, in 2014, Naizhi Wang, Qiang Liu et al published a paper in IEEE Transactions on Antennas and Propagation, and the paper is named as Wideband Fabry-Perot Resonator Antenna With Two complementary FSS Layers, wherein a broadband Fabry-Perot resonant cavity Antenna is disclosed, and the Antenna realizes a gain bandwidth of 28% and 3 dB.
In patent application CN201510446373.6, an improved Fabry-perot resonator antenna is provided, which comprises a feed and a single-layer partial reflection. The feed source is a rectangular patch antenna, a partial reflecting plate is arranged above the feed source in parallel, and a resonant cavity is formed between the feed source and the partial reflecting plate; the partial reflecting plate is of a double-sided coating structure, the upper surface of the partial reflecting plate is a copper-clad array which is periodically distributed, the lower surface of the partial reflecting plate is a hollow cross-shaped copper-clad square array which is periodically distributed, and the antenna achieves 11.23% of gain bandwidth.
Although the technical solutions described in the above documents and patent applications improve the gain bandwidth of the antenna to some extent, there still exists a disadvantage in the technical solutions that these antennas can only implement radiation in a single polarization direction, and cannot implement dual-polarization radiation.
Therefore, based on the above, the invention provides a novel Fabry-Perot resonant cavity antenna, which has the characteristics of dual polarization, high gain, wide frequency band and miniaturization, thereby overcoming the defects and limitations in the prior art.
Disclosure of Invention
The invention aims to provide a miniaturized dual-polarized broadband Fabry-Perot resonant cavity antenna which has the characteristics of dual polarization, high gain, broadband and miniaturization.
In order to achieve the above object, the present invention provides a miniaturized dual-polarized broadband Fabry-perot resonator antenna, comprising: the antenna comprises a square patch antenna, a feed network arranged below the square patch antenna and a reflecting cover plate arranged above the square patch antenna; wherein, the feed network includes: the upper surface of the first dielectric substrate forms a Y-shaped first microstrip feeder line by copper plating; the lower surface of the second dielectric substrate forms a Y-shaped second microstrip feeder line by copper plating, and the second microstrip feeder line and the first microstrip feeder line are arranged in a mutually vertical manner; the grounding plate is arranged between the first dielectric substrate and the second dielectric substrate; the square patch antenna is a third dielectric substrate with one copper-clad surface; the reflecting cover plate is a single-layer fourth dielectric substrate with copper coated on both sides.
The ground plate is provided with a cross-shaped through hole, the cross-shaped through hole is respectively overlapped with the tail end of the first microstrip line and the tail end of the second microstrip line, and the first microstrip line and the second microstrip line carry out coupling feed on the square patch antenna through the cross-shaped through hole in the ground plate, so that dual-polarization radiation is realized.
The tail ends of the first microstrip feeder line and the second microstrip feeder line are of U-shaped structures, and a plurality of tuning branches are arranged on the two sides and the tail of each U-shaped structure outwards to realize adjustment of impedance matching.
The lower surface of the third dielectric substrate forms a square first copper-clad structure through copper cladding, the first copper-clad structure is positioned in the center of the lower surface of the third dielectric substrate, and the area of the first copper-clad structure is smaller than that of the third dielectric substrate.
The feed network is correspondingly provided with a plurality of first positioning holes which sequentially penetrate through the first dielectric substrate, the ground plate and the second dielectric substrate, one end of the nylon dielectric support column is fixedly arranged in the first positioning hole on the third dielectric substrate, the other end of the nylon dielectric support column is fixedly arranged in the corresponding first positioning hole on the feed network, and the square patch antenna is supported to be arranged above the first dielectric substrate and keeps a gap with the ground plate.
The interval between the third dielectric substrate and the grounding plate is 1/2 of the operating wavelength of the antenna.
A plurality of square annular second copper-clad structures with the same size are periodically arranged on the upper surface of the fourth dielectric substrate; the lower surface of the fourth dielectric substrate is periodically provided with a plurality of square holes with the same size, and the region without the square holes on the lower surface of the fourth dielectric substrate is provided with a third copper-clad structure through copper cladding.
Each second copper-clad structure on the upper surface of the fourth dielectric substrate is concentrically arranged corresponding to each square hole on the lower surface of the fourth dielectric substrate; and the length of the outer edge of the second copper-clad structure is larger than the side length of the square hole.
The fourth dielectric substrate is provided with a plurality of second positioning holes, the feed network is correspondingly provided with a plurality of second positioning holes which sequentially penetrate through the first dielectric substrate, the ground plate and the second dielectric substrate, one end of the nylon dielectric support column is fixedly arranged in the second positioning hole on the fourth dielectric substrate, the other end of the nylon dielectric support column is fixedly arranged in the corresponding second positioning hole on the feed network, and the reflection cover plate is supported to be arranged above the square patch antenna and keeps a gap with the ground plate.
The interval between the reflection cover plate and the grounding plate is 0.487-0.517 times of the wavelength in vacuum.
In summary, the miniaturized dual-polarized broadband Fabry-Perot resonant cavity antenna provided by the invention adopts the square patch antenna as an excitation source, the single-layer double-sided copper-clad dielectric substrate as a reflecting cover plate of the antenna, and the dual-fed excitation mode is adopted to realize the dual-polarized working mode of the Fabry-Perot resonant cavity antenna; furthermore, the ground plate is arranged between the two mutually perpendicular microstrip feeder lines, so that the isolation of the two polarization modes reaches below 40 dB; moreover, for each polarized working mode, the Fabry-Perot resonant cavity antenna can realize 20% of 10dB impedance bandwidth, and the gain in a frequency band is more than 13 dB; meanwhile, the size of the aperture surface of the Fabry-Perot resonant cavity antenna is only about 2 times of the wavelength in vacuum, and the Fabry-Perot resonant cavity antenna has the advantage of miniaturization.
Drawings
FIG. 1 is a schematic structural diagram of a miniaturized dual-polarized broadband Fabry-Perot cavity antenna according to the present invention;
FIG. 2 is a schematic structural diagram of the upper surface of the reflective cover plate according to the present invention;
FIG. 3 is a schematic view of the structure of the lower plane of the reflective cover plate of the present invention;
fig. 4 is a schematic structural diagram of a square patch antenna according to the present invention;
FIG. 5 is a schematic structural diagram of a feed network according to the present invention;
FIG. 6a is a schematic diagram showing the relationship between the amplitude and the frequency of the reflection coefficient of the reflection cover plate in the present invention, and FIG. 6b is a schematic diagram showing the relationship between the phase and the frequency of the reflection coefficient of the reflection cover plate in the present invention;
FIGS. 7a and 7b are S-parameter graphs of a miniaturized dual-polarized broadband Fabry-Perot cavity antenna according to the present invention, respectively;
FIG. 8 is the radiation pattern of the miniaturized dual-polarized broadband Fabry-Perot cavity antenna in the present invention at 10GHz, where FIG. 8a is the polarization gain diagram in the X direction and FIG. 8b is the polarization gain diagram in the Y direction.
Detailed Description
The technical contents, construction features, achieved objects and effects of the present invention will be described in detail by preferred embodiments with reference to fig. 1 to 8.
As shown in fig. 1, the miniaturized dual-polarized broadband Fabry-perot resonator antenna provided by the present invention comprises: the antenna comprises a square patch antenna, a feed network arranged below the square patch antenna and a reflecting cover plate arranged above the square patch antenna; namely, the square patch antenna is positioned in the middle of the whole Fabry-Perot resonant cavity antenna.
As shown in fig. 1 and 5, the feeding network includes: a first dielectric substrate 8 with copper coated on one side arranged on the upper layer, a second dielectric substrate 9 with copper coated on one side arranged on the lower layer, and a grounding plate 3 arranged between the first dielectric substrate 8 and the second dielectric substrate 9. The upper surface of the first dielectric substrate 8 is coated with copper to form a Y-shaped first microstrip feeder line 10. Similarly, the lower surface of the second dielectric substrate 9 is plated with copper to form a Y-shaped second microstrip feed line 4.
Further, the first microstrip feed line 10 and the second microstrip feed line 4 are arranged perpendicular to each other. As shown in fig. 5, the ground plate 3 is provided with a cross-shaped through hole 11, the cross-shaped through hole 11 is respectively overlapped with the tail end of the first microstrip feed line 10 and the tail end of the second microstrip feed line 4, and the first microstrip feed line 10 and the second microstrip feed line 4 perform coupling feed on the square patch antenna located above through the cross-shaped through hole 11 on the ground plate 3, so as to implement dual-polarization radiation. In addition, since the ground plate 3 is provided between the first dielectric substrate 8 and the second dielectric substrate 9, a high polarization isolation can be achieved.
Preferably, as shown in fig. 5, the ends of the first microstrip feed line 10 and the second microstrip feed line 4 both adopt U-shaped structures 12, and a plurality of tuning branches 13 are respectively arranged on both sides and the tail of the U-shaped structure 12 of each microstrip line in an outward loading manner for adjusting impedance matching, so as to achieve good impedance matching of a wide frequency band.
As shown in fig. 5, in this embodiment, the U-shaped structure 12 of the first microstrip feed line 10 is provided with 4 tuning branches, which are respectively located in the middle and the tail of the U-shaped structure 12. The U-shaped structure 12 of the second microstrip feed line 4 is also provided with 4 tuning branches, which are also respectively located at the middle part and the tail part of the two sides of the U-shaped structure 12. Good impedance matching of a wide frequency band is achieved by providing the tuning stubs 13.
As shown in fig. 1 and 4, the square patch antenna is disposed between the feed network and the reflective cover plate, and is composed of a third dielectric substrate 2 with one side coated with copper. The lower surface of the third dielectric substrate 2 is plated with copper to form a square first copper-plated structure 7, as shown in fig. 4, the first copper-plated structure 7 is located in the center of the lower surface of the third dielectric substrate 2 and is smaller than the area of the third dielectric substrate 2.
Further, as shown in fig. 4, a plurality of first positioning holes 16 are formed in the area of the third dielectric substrate 2 not covered by the first copper-clad structure 7 (in this embodiment, the first positioning holes 16 are respectively formed at the 4 vertex angles of the third dielectric substrate 2, the distance from the first positioning hole 16 to the edge of the third dielectric substrate 2 can be determined according to the actual situation, the distance between the edge and the third dielectric substrate has little influence on the performance of the antenna and only plays a supporting role), the feeding network is correspondingly formed with a plurality of first positioning holes 16 sequentially penetrating through the first dielectric substrate 8, the ground plate 3 and the second dielectric substrate 9, one end of the nylon dielectric support column is fixedly disposed in the first positioning hole 16 on the third dielectric substrate 2, and the other end is fixedly disposed in the corresponding first positioning hole 16 on the feeding network, so as to support the square patch antenna and place the square patch antenna above the first dielectric substrate 8, and maintains a space h _ air from the ground plate 3.
Further, as shown in fig. 1, the third dielectric substrate is spaced from the ground plane by about 1/2 of the operating wavelength of the antenna.
The reflecting cover plate is composed of a single-layer fourth dielectric substrate 6 with copper coated on both sides. As shown in fig. 2, a plurality of square ring shaped second copper clad structures 5 with the same size are periodically arranged on the upper surface of the fourth dielectric substrate 6, that is, the square ring shaped surface is copper clad, and the surface of the central opening part is not copper clad. As shown in fig. 3, a plurality of square holes 14 with the same size are periodically arranged on the lower surface of the fourth dielectric substrate 6, and the region of the lower surface of the fourth dielectric substrate 6 where no square hole 14 is arranged forms the third copper-clad structure 1 by copper cladding.
The square ring-shaped second copper-clad structures 5 on the upper surface of the fourth dielectric substrate 6 are respectively arranged corresponding to the square holes 14 on the lower surface of the fourth dielectric substrate 6 (namely, the number of the square ring-shaped second copper-clad structures is the same), and the second copper-clad structures 5 are concentrically arranged with the corresponding square holes 14, and meanwhile, the length of the outer edge of each second copper-clad structure 5 must be greater than the side length of each square hole 14.
In this embodiment, the dielectric constant of the fourth dielectric substrate 6 is 2.2, and the thickness is 0.787 mm. As shown in FIG. 2, the second copper clad laminate structure 5 has an inner hole side length a of 1.5mm and an outer edge length b of 4.7 mm. Wherein, the second copper clad structure 5 positioned at the outermost circle has the edge distance of 0.15mm from the fourth dielectric substrate 6. The second copper-clad structure 5 is arranged periodically in the X direction and the Y direction, the distance g between two adjacent second copper-clad structures 5 is 0.3mm in the X direction and the Y direction, and the outer side length b of the second copper-clad structure 5 is 4.7mm, so that the period P of the arrangement unit of the second copper-clad structure 5 is 5 mm. As shown in fig. 3, the side length b1 of the square hole 14 is 4 mm. The square hole 14 located at the outermost circle is 0.5mm away from the fourth dielectric substrate 6. The square holes 14 are arranged periodically in the X direction and the Y direction, a distance g1 between two adjacent square holes 14 is 1mm, and the side length b1 of each square hole 14 is 4mm, so that the arrangement unit period P of each square hole 14 is also 5 mm. Finally, adding the margin of the outermost circle, the length of the fourth dielectric substrate is the product of the arrangement unit period P and the arrangement number of the square holes 14 or the second copper-clad structures 5 in the X direction, and the width of the fourth dielectric substrate is the product of the arrangement unit period P and the arrangement number of the square holes 14 or the second copper-clad structures 5 in the Y direction.
In other preferred embodiments of the present invention, if other types of circuit boards are used for the fourth dielectric substrate 6, the size of the second copper clad structure 5 and the size of the square hole 14 are different according to the above design theory, but the variation of these parameters is related to the dielectric constant of the fourth dielectric substrate 6.
Further, as shown in fig. 2 and fig. 3, a plurality of second positioning holes 15 are formed in the fourth dielectric substrate 6 (in this embodiment, positioning holes 15 are respectively formed at 4 vertex angles of the fourth dielectric substrate 6); as shown in fig. 5, the feeding network is correspondingly provided with a plurality of second positioning holes 15 sequentially penetrating through the first dielectric substrate 8, the ground plate 3 and the second dielectric substrate 9 (in this embodiment, the second positioning holes 15 are respectively formed at 4 vertex angles of the feeding network), and one end of the nylon dielectric support column is fixedly arranged in the second positioning hole 15 on the fourth dielectric substrate 6, and the other end of the nylon dielectric support column is fixedly arranged in the corresponding second positioning hole 15 on the feeding network, so as to support the reflective cover plate to be arranged above the square patch antenna, and maintain an interval h _ prs with the ground plate 3.
Further, as shown in fig. 1, the distance h _ prs between the reflective cover plate and the ground plate 3 is set to be 0.487 to 0.517 times of the wavelength in vacuum. In this embodiment, the interval h _ prs between the reflective cover plate and the ground plate 3 is set to 0.5 times the wavelength in vacuum.
In summary, the miniaturized dual-polarized broadband Fabry-Perot resonant cavity antenna provided by the invention adopts the square patch antenna as an excitation source, adopts the single-layer dielectric substrate with copper coated on both sides as a reflecting cover plate of the antenna, and realizes a double-fed excitation mode through two microstrip lines which are vertically arranged, thereby realizing a dual-polarized working mode of the Fabry-Perot resonant cavity antenna; furthermore, the ground plate is arranged between the two mutually vertical microstrip lines, so that the isolation of the two polarization modes reaches below 40 dB; moreover, for each polarized working mode, the Fabry-Perot resonant cavity antenna can realize 20% of 10dB impedance bandwidth, and the gain in the working bandwidth is more than 13 dB; meanwhile, the Fabry-Perot resonant cavity antenna adopts a smaller reflecting cover plate with a compact structure, so that the size of the opening surface of the antenna is only about 2 times of the wavelength in vacuum, and the Fabry-Perot resonant cavity antenna has the advantage of miniaturization.
Specifically, as shown in fig. 6a, the relationship between the amplitude and the frequency of the reflection coefficient of the reflection cover plate in the present invention is shown, and as shown in fig. 6b, the relationship between the phase and the frequency of the reflection coefficient of the reflection cover plate in the present invention is shown. It can be seen that when the frequency is within the reflection range of 9GHz to 11GHz, the phase of the reflection coefficient and the frequency are in positive correlation, and the reflection coefficient has a higher mode value, so that the impedance bandwidth and the gain are both improved.
As shown in fig. 7a and fig. 7b, they are S-parameter graphs of the miniaturized dual-polarized broadband Fabry-perot resonator antenna of the present invention, wherein S11_ port1 is a reflection coefficient curve of the excitation port1, S11_ port2 is a reflection coefficient curve of the excitation port2, and S21 is a port isolation curve of the excitation port1 and the excitation port 2. Simulation results show that the isolation of the invention in two polarization modes reaches below 40 dB; also, for each polarization mode of operation, the Fabry-Perot cavity antenna is capable of achieving a 10dB impedance bandwidth of 20%.
As shown in fig. 8, which is a radiation pattern of the miniaturized dual-polarized broadband Fabry-perot resonator antenna of the present invention at 10GHz, where fig. 8a is an X-direction polarization gain diagram and fig. 8b is a Y-direction polarization gain diagram, simulation results show that in the X-direction polarization, the main polarization gain amplitude is above 13dB, and in the Y-direction polarization, the main polarization gain amplitude is above 13 dB. Only the polarization gain pattern at the center frequency is provided here, and the gain can reach over 13dB over the entire operating band.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. A miniaturized dual polarized broadband Fabry-Perot resonator antenna, comprising: the antenna comprises a square patch antenna, a feed network arranged below the square patch antenna and a reflecting cover plate arranged above the square patch antenna; wherein the content of the first and second substances,
the feed network comprises: the upper surface of the first dielectric substrate is coated with copper to form a Y-shaped first microstrip line; the lower surface of the second dielectric substrate is coated with copper to form a Y-shaped second microstrip line, and the second microstrip line and the first microstrip line are arranged vertically; the grounding plate is arranged between the first dielectric substrate and the second dielectric substrate;
the square patch antenna is a third dielectric substrate with one copper-clad surface;
the reflecting cover plate is a single-layer fourth dielectric substrate with copper coated on both sides.
2. The miniaturized dual-polarized broadband fabry-perot resonator antenna of claim 1, wherein the ground plate is provided with a cross-shaped through hole, the cross-shaped through hole is respectively overlapped with the tail end of the first microstrip line and the tail end of the second microstrip line, and the first microstrip line and the second microstrip line are coupled with the square patch antenna through the cross-shaped through hole on the ground plate for feeding, so as to realize dual-polarized radiation.
3. The miniaturized dual-polarized broadband fabry-perot resonator antenna of claim 2, wherein the ends of the first microstrip line and the second microstrip line are both U-shaped structures, and a plurality of tuning branches are arranged at both sides and the tail of each U-shaped structure to the outside to realize the adjustment of impedance matching.
4. The miniaturized dual-polarized broadband fabry-perot resonator antenna of claim 1, wherein the lower surface of the third dielectric substrate is formed with a first copper-clad structure by copper-cladding, the first copper-clad structure is located at the center of the lower surface of the third dielectric substrate, and the area of the first copper-clad structure is smaller than that of the third dielectric substrate.
5. The miniaturized dual-polarized broadband fabry-perot resonator antenna according to claim 4, wherein a plurality of first positioning holes are formed in the third dielectric substrate, a plurality of first positioning holes sequentially penetrating through the first dielectric substrate, the ground plate and the second dielectric substrate are correspondingly formed in the feed network, and one end of a nylon dielectric support column is fixedly arranged in the first positioning hole in the third dielectric substrate, and the other end of the nylon dielectric support column is fixedly arranged in the corresponding first positioning hole in the feed network, so that the square patch antenna is supported to be arranged above the first dielectric substrate and keep a gap with the ground plate.
6. The miniaturized dual-polarized broadband fabry-perot resonator antenna of claim 5, wherein the third dielectric substrate is spaced from the ground plane by 1/2 times the operating wavelength of the antenna.
7. The miniaturized dual-polarized broadband fabry-perot resonator antenna of claim 1, wherein a plurality of square ring-shaped second copper-clad structures with the same size are periodically arranged on the upper surface of the fourth dielectric substrate; the lower surface of the fourth dielectric substrate is periodically provided with a plurality of square holes with the same size, and the region without the square holes on the lower surface of the fourth dielectric substrate is provided with a third copper-clad structure through copper cladding.
8. The miniaturized dual-polarized broadband fabry-perot resonator antenna of claim 6, wherein each second copper-clad structure on the upper surface of the fourth dielectric substrate is concentrically disposed corresponding to each square hole on the lower surface of the fourth dielectric substrate; and the length of the outer edge of the second copper-clad structure is larger than the side length of the square hole.
9. The miniaturized dual-polarized broadband fabry-perot resonator antenna of claim 6, wherein a plurality of second positioning holes are formed in the fourth dielectric substrate, a plurality of second positioning holes sequentially penetrating through the first dielectric substrate, the ground plate and the second dielectric substrate are correspondingly formed in the feed network, one end of the nylon dielectric support column is fixedly arranged in the second positioning hole in the fourth dielectric substrate, the other end of the nylon dielectric support column is fixedly arranged in the corresponding second positioning hole in the feed network, and the reflective cover plate is supported to be arranged above the square patch antenna and keep a gap with the ground plate.
10. The miniaturized dual-polarized broadband fabry-perot resonator antenna of claim 9, wherein the distance between the reflective cover plate and the ground plate is 0.487 to 0.517 times the wavelength in vacuum.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010748652.9A CN111755809A (en) | 2020-07-30 | 2020-07-30 | Miniaturized dual-polarized broadband Fabry-Perot resonant cavity antenna |
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| CN202010748652.9A CN111755809A (en) | 2020-07-30 | 2020-07-30 | Miniaturized dual-polarized broadband Fabry-Perot resonant cavity antenna |
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| CN202010748652.9A Pending CN111755809A (en) | 2020-07-30 | 2020-07-30 | Miniaturized dual-polarized broadband Fabry-Perot resonant cavity antenna |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112838376A (en) * | 2021-01-07 | 2021-05-25 | 西安电子科技大学 | Broadband high-gain Fabry-Perot resonant cavity antenna based on regular hexagonal unit |
| CN112886272A (en) * | 2021-01-14 | 2021-06-01 | 西安电子科技大学 | Dual-frequency dual-polarization Fabry-Perot resonant cavity antenna |
| CN112952403A (en) * | 2021-01-27 | 2021-06-11 | 电子科技大学 | Dual-polarized array antenna with rectangular flat-top forming |
| CN113013607A (en) * | 2021-02-25 | 2021-06-22 | 西南交通大学 | Low profile low RCS Fabry-Perot resonator antenna |
| CN113285237A (en) * | 2021-05-18 | 2021-08-20 | 重庆邮电大学 | Broadband high-gain Fabry-Perot resonant cavity antenna |
| CN114843771A (en) * | 2022-04-25 | 2022-08-02 | 重庆邮电大学 | Fabry-Perot resonant cavity antenna with 1dB gain bandwidth |
| CN115036704A (en) * | 2022-06-30 | 2022-09-09 | 西安电子科技大学 | Dual-frequency dual-polarization high-gain Fabry-Perot resonant cavity antenna |
| CN116706566A (en) * | 2023-07-19 | 2023-09-05 | 重庆邮电大学空间通信研究院 | Fabry-Perot cavity structural type large-spacing phased array antenna |
| WO2023174436A1 (en) * | 2022-03-14 | 2023-09-21 | 东南大学 | Dual-band high-gain common-aperture antenna having large frequency ratio |
| WO2024133364A1 (en) * | 2022-12-22 | 2024-06-27 | Universite Claude Bernard Lyon 1 | Device comprising a microwave antenna and structures producing constructive interference |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299409A (en) * | 2011-05-16 | 2011-12-28 | 电子科技大学 | Broadband dual polarized base station antenna applied to IMT-Advanced system |
| CN105071051A (en) * | 2015-07-27 | 2015-11-18 | 哈尔滨工业大学 | Improved Fabry-Perot resonant cavity antenna |
| CN107039758A (en) * | 2017-03-07 | 2017-08-11 | 广东通宇通讯股份有限公司 | Dual polarization broadband Fabry P é rot antennas |
| CN108767493A (en) * | 2018-05-31 | 2018-11-06 | 西安电子科技大学 | Two dimensional beam deflects Fabry-Perot cavity antenna |
| CN109802232A (en) * | 2019-03-14 | 2019-05-24 | 哈尔滨工程大学 | Fabry-Perot resonant cavity wide band high-gain microstrip antenna based on single-layer double-side coat structure |
-
2020
- 2020-07-30 CN CN202010748652.9A patent/CN111755809A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299409A (en) * | 2011-05-16 | 2011-12-28 | 电子科技大学 | Broadband dual polarized base station antenna applied to IMT-Advanced system |
| CN105071051A (en) * | 2015-07-27 | 2015-11-18 | 哈尔滨工业大学 | Improved Fabry-Perot resonant cavity antenna |
| CN107039758A (en) * | 2017-03-07 | 2017-08-11 | 广东通宇通讯股份有限公司 | Dual polarization broadband Fabry P é rot antennas |
| CN108767493A (en) * | 2018-05-31 | 2018-11-06 | 西安电子科技大学 | Two dimensional beam deflects Fabry-Perot cavity antenna |
| CN109802232A (en) * | 2019-03-14 | 2019-05-24 | 哈尔滨工程大学 | Fabry-Perot resonant cavity wide band high-gain microstrip antenna based on single-layer double-side coat structure |
Non-Patent Citations (1)
| Title |
|---|
| RUINA LIAN 等: "Design of a Broadband Polarization-Reconfigurable Fabry–Perot Resonator Antenna", 《IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS》 * |
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| CN112838376A (en) * | 2021-01-07 | 2021-05-25 | 西安电子科技大学 | Broadband high-gain Fabry-Perot resonant cavity antenna based on regular hexagonal unit |
| CN112886272A (en) * | 2021-01-14 | 2021-06-01 | 西安电子科技大学 | Dual-frequency dual-polarization Fabry-Perot resonant cavity antenna |
| CN112952403B (en) * | 2021-01-27 | 2022-05-03 | 电子科技大学 | Dual-polarized array antenna with rectangular flat-top forming |
| CN112952403A (en) * | 2021-01-27 | 2021-06-11 | 电子科技大学 | Dual-polarized array antenna with rectangular flat-top forming |
| CN113013607A (en) * | 2021-02-25 | 2021-06-22 | 西南交通大学 | Low profile low RCS Fabry-Perot resonator antenna |
| CN113013607B (en) * | 2021-02-25 | 2022-02-01 | 西南交通大学 | Low profile low RCS Fabry-Perot resonator antenna |
| CN113285237A (en) * | 2021-05-18 | 2021-08-20 | 重庆邮电大学 | Broadband high-gain Fabry-Perot resonant cavity antenna |
| CN113285237B (en) * | 2021-05-18 | 2022-06-14 | 重庆邮电大学 | Broadband high-gain Fabry-Perot resonant cavity antenna |
| WO2023174436A1 (en) * | 2022-03-14 | 2023-09-21 | 东南大学 | Dual-band high-gain common-aperture antenna having large frequency ratio |
| CN114843771A (en) * | 2022-04-25 | 2022-08-02 | 重庆邮电大学 | Fabry-Perot resonant cavity antenna with 1dB gain bandwidth |
| CN115036704A (en) * | 2022-06-30 | 2022-09-09 | 西安电子科技大学 | Dual-frequency dual-polarization high-gain Fabry-Perot resonant cavity antenna |
| WO2024133364A1 (en) * | 2022-12-22 | 2024-06-27 | Universite Claude Bernard Lyon 1 | Device comprising a microwave antenna and structures producing constructive interference |
| FR3144429A1 (en) * | 2022-12-22 | 2024-06-28 | Universite Claude Bernard Lyon 1 | Device including a microwave antenna and constructive interference producing structures |
| CN116706566A (en) * | 2023-07-19 | 2023-09-05 | 重庆邮电大学空间通信研究院 | Fabry-Perot cavity structural type large-spacing phased array antenna |
| CN116706566B (en) * | 2023-07-19 | 2024-02-09 | 石家庄锐创电子科技有限公司 | Fabry-Perot cavity structural type large-spacing phased array antenna |
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