CN114069256A - Double-frequency double-circular polarization folding reflective array antenna - Google Patents
Double-frequency double-circular polarization folding reflective array antenna Download PDFInfo
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Abstract
The invention provides a dual-frequency dual-circular polarization folding reflective array antenna, which aims to ensure the radiation characteristic of a circular polarization folding reflective array antenna, simplify the structure of the antenna and widen the functional range of the circular polarization folding reflective array antenna, and comprises a main reflector, an auxiliary transmission mirror, a supporting structure and a feed source; the main reflector comprises a first medium substrate with a hollow center, square annular metal patches are printed on the upper surface of the medium substrate and are periodically arranged and used for realizing linear polarization conversion and conversion from spherical waves to plane waves, and a metal floor is printed on the lower surface of the medium substrate; the auxiliary transmission mirror comprises a second medium substrate and a third medium substrate which are vertically stacked, a metal floor with a leaky wave gap is printed on the lower surface of the second medium substrate, two circular metal patches with different specifications are printed on the upper surface of the second medium substrate and the lower surface of the third medium substrate, and the circular metal patches are connected through a metalized through hole penetrating through the leaky wave gap and used for realizing the dual-frequency dual-circular polarization radiation characteristic.
Description
Technical Field
The invention belongs to the technical field of antennas, relates to a folding reflective array antenna, and particularly relates to a dual-frequency dual-circular polarization folding reflective array antenna which can be used in the field of wireless satellite communication.
Technical Field
The same path is generally adopted for uplink signals and downlink signals in wireless satellite communication, and if a pair of antennas with the same frequency band and the same polarization are adopted as transceiving antennas, signal interference is inevitably generated. Therefore, two antennas with different frequency bands and different polarizations are generally selected as transceiving antennas in wireless satellite communication. In addition, compared with a linear polarization antenna, the circular polarization antenna has the advantages of minimum polarization mismatch components and environmental interference suppression, and therefore, the circular polarization antenna is more advantageous in a wireless satellite communication system.
The reflective array antenna is a planar high-gain antenna, is very suitable for satellite communication, namely remote communication, has the advantages of simple structure, low processing cost, small volume, easiness in implementation and the like, and is widely applied to the field of wireless satellite communication. The reflective array antenna adopts a space feed mode, so that the volume of the reflective array antenna is larger; in addition, the feed source loudspeaker is placed in front of the radiation caliber, and meanwhile, the normal radiation of electromagnetic waves can be shielded. In order to solve the problems of large size and shielding effect, in 1998, w.menzel and d.pilz propose a folded reflective array antenna, which consists of a main reflector with polarization torsion characteristics and a polarization grid with polarization selection characteristics, so that the section height of the reflective array antenna is reduced to one half of the focal length of a main surface, and the volume of the reflective array antenna is greatly reduced. However, the main design goal of such folded reflective array antennas is to achieve linearly polarized high gain radiation.
In order to realize the circular polarization radiation characteristic of the folded reflective array antenna, for example, in the patent application with the application publication number of CN111636005A entitled "a full-integrated wide-angle scanning circular polarization folded reflective array antenna", a circular polarization folded reflective array antenna is disclosed, which comprises a main reflector, a polarization grid array, a polarization converter and a plurality of feed source antennas integrated on the main reflector, wherein the main reflector and the polarization grid array form a traditional folded reflective array structure, and can convert the electromagnetic wave radiated by the feed source into a linear polarization high-gain beam, and the polarization converter is used for converting the linear polarization beam into a circular polarization beam. The disadvantages of the invention are: the circularly polarized radiation is realized by adding the polarization converter in front of the radiation aperture, so that the structure of the antenna is more complicated, and the processing cost is increased; meanwhile, the antenna can only realize single-frequency single circularly polarized radiation, and two folding reflection array antennas are required to be equipped for realizing uplink and downlink communication in a satellite communication system.
However, in the face of a more complex communication environment at present, if one antenna can be used to simultaneously implement the dual-frequency dual-circular polarization function, the design cost of the satellite communication system can be reduced, and the structure of the satellite communication system is simplified, so that it is of great significance to implement dual-frequency dual-circular polarization radiation by widening the function of the folded reflective array antenna; meanwhile, if the functions of the polarization switch and the polarization grid can be combined to simultaneously realize the polarization selection and the conversion of linear polarization into circular polarization, the antenna structure can be simplified and the manufacturing cost can be reduced.
Disclosure of Invention
The invention mainly aims to overcome the defects of the prior art, provides a dual-frequency dual-circular polarization folding reflective array antenna, and aims to simplify the antenna structure and widen the functional range of the circular polarization folding reflective array antenna while ensuring the radiation characteristic of the circular polarization folding reflective array antenna.
In order to achieve the purpose, the invention adopts the technical scheme that the device comprises a main reflector 1 and a secondary transmission mirror 3 fixed at a half focal length position of the main reflector 1 through a support structure 2 made of non-metallic materials, wherein:
the main mirror 1 is provided with a mirror for reflecting light,the dielectric substrate comprises a square first dielectric substrate 11 with a hollow center, wherein M multiplied by N square annular metal patches 111 with double openings and periodically arranged are printed on the upper surface of the first dielectric substrate 11, M is more than or equal to 8, N is more than or equal to 8, and the rotation direction and the opening size of each square annular metal patch 111 pass through the phase compensation value phi of the position of the square annular metal patchP(x, y) determining that a first metal floor 112 is printed on the lower surface of the first dielectric substrate 11;
the secondary transmission mirror 3 comprises a second dielectric substrate 31 and a third dielectric substrate 32 which are stacked up and down; p × Q first circular metal patches 311 which are periodically arranged are printed on the upper surface of the second dielectric substrate 31, and a second circular metal patch 312 is printed at an intersection position of every four first circular metal patches 311 to form an array including R × S second circular metal patches 312, where P is not more than M, Q is not more than N, R is P-1, and S is Q-1; a rectangular notch is etched at the position of any one of the diameters of the first circular metal patch 311 and the second circular metal patch 312, which is intersected with the circumference of the first circular metal patch 312 and the second circular metal patch 312, so as to realize the dual-frequency dual-circular polarization radiation characteristic, C-shaped gaps are etched at the central positions of the first circular metal patch 311 and the second circular metal patch 312, and the opening directions of the C-shaped gaps on the first circular metal patch 311 and the second circular metal patch 312 are vertical; a second metal floor 313 is printed on the lower surface of the second dielectric substrate 31, and a leaky wave gap 3131 is etched at the corresponding positions of the second metal floor 313, the first circular metal patch 311 and the second circular metal patch 312; a third circular metal patch 321 is printed at the projection position of each first circular metal patch 311 on the lower surface of the third dielectric substrate 32, a fourth circular metal patch 322 is printed at the projection position of each second circular metal patch 312, C-shaped gaps are etched at the center positions of the third circular metal patch 321 and the fourth circular metal patch 322 respectively, and the opening directions of the C-shaped gaps on the third circular metal patch 321 and the fourth circular metal patch 322 are the same; the first circular metal patch 311 and the third circular metal patch 321 at the corresponding position thereof, and the second circular metal patch 312 and the fourth circular metal patch 322 at the corresponding position thereof are connected through a metalized through hole 33 passing through the leaky wave slot 3131;
according to the double-frequency double-circular-polarization folding reflective array antenna, the feed source 4 is fixed at the hollow position of the center of the main reflector 1, and the phase center of the feed source 4 is superposed with the center position of the main reflector 1.
In the dual-frequency dual-circular polarization folded reflective array antenna, the central normal of the main reflector 1 and the central normal of the auxiliary transmission mirror 3 coincide.
The dual-frequency dual-circular polarization folded reflective array antenna comprises a square annular metal patch 111 with dual openings, wherein two openings are arranged on one pair of opposite angles of the square annular metal patch 111, two V-shaped metal patches 1111 on the other pair of opposite angles of the square annular metal patch 111 form a dual-V-shaped structure, and a rectangular metal strip 1112 is connected between the two V-shaped metal patches 1111 in the dual-V-shaped structure; the phase compensation value phi of the position of the square annular metal patch 111 with the double openingsPThe formula for the calculation of (x, y) is:
where k is the wave number in free space, (x, y) are the central coordinates of the square annular metal patch 111 with double openings, f is the focal length of the primary mirror 1, and Φ0Is an arbitrary constant phase value.
In the dual-band dual-circular-polarization folded reflective array antenna, the specification of the first circular metal patch 311 is the same as that of the third circular metal patch 321, the specifications of the C-shaped gaps etched on the first circular metal patch 311 and the third circular metal patch 321 are the same, and the central normals of the first circular metal patch 311 and the third circular metal patch 321 are coincident; the specification of the third circular metal patch 312 is the same as that of the fourth circular metal patch 322, the specification of the C-shaped gap etched on the third circular metal patch 312 and the fourth circular metal patch 322 is the same, and the central normal lines of the third circular metal patch 312 and the fourth circular metal patch 322 are coincident.
In the dual-frequency dual-circular polarization folding reflective array antenna, the feed source 4 adopts a rectangular horn antenna structure.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the third circular metal patch and the fourth circular metal patch are etched with C-shaped gaps to form an anisotropic structure, so that the polarization selection function can be realized, and meanwhile, the third circular metal patch and the fourth circular metal patch can couple linearly polarized electromagnetic waves to the first circular metal patch and the second circular metal patch through the metal through holes to form circularly polarized electromagnetic waves, so that the functions of the polarization grid and the polarization converter are combined, the defect of complex structure caused by the fact that the polarization converter is directly loaded right in front of the polarization grid to realize the circularly polarized function in the prior art is avoided, and the processing cost is effectively reduced.
2. The two dielectric substrates of the auxiliary transmission mirror comprise two metal patches with different specifications, the combination of the first circular metal patch and the third circular metal patch can realize right-handed circular polarized radiation under low frequency, the combination of the second circular metal patch and the fourth circular metal patch can realize left-handed circular polarized radiation under high frequency, the limitation that the prior art can only realize single-frequency single-pole radiation is avoided, and the functional range of the circular polarized folded reflective array antenna is widened while the radiation characteristic is ensured.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the main reflector of the present invention and a partial enlarged view of a square annular metal patch with dual openings;
fig. 3 is a schematic structural diagram of the sub-transmission mirror of the present invention, wherein fig. 3(a) is a schematic structural diagram of an upper surface of a second dielectric substrate in the sub-transmission mirror and a partially enlarged view of a first circular metal patch and a second circular metal patch, fig. 3(b) is a cross-sectional view of the sub-transmission mirror at the cross-section of fig. 3(a), fig. 3(c) is a schematic structural diagram of a lower surface of the second dielectric substrate in the sub-transmission mirror, and fig. 3(d) is a schematic structural diagram of a lower surface of a third dielectric substrate in the sub-transmission mirror and a partially enlarged view of a third circular metal patch and a fourth circular metal patch;
FIG. 4 is a graph of reflection coefficient at low frequency operation for an embodiment of the present invention;
FIG. 5 is an E-plane radiation pattern at a frequency of 12.5GHz in accordance with a specific embodiment of the present invention;
FIG. 6 is an H-plane radiation pattern at a frequency of 12.5GHz in accordance with a specific embodiment of the present invention;
FIG. 7 is an axial ratio plot of right hand circular polarization at a frequency of 12.5GHz in accordance with an embodiment of the present invention;
FIG. 8 is a graph of reflection coefficient at high frequency operation for a specific embodiment of the present invention;
FIG. 9 is an E-plane radiation pattern at a frequency of 14.2GHz in accordance with an embodiment of the present invention;
FIG. 10 is an H-plane radiation pattern at a frequency of 14.2GHz in accordance with an embodiment of the invention;
FIG. 11 is a graph of axial ratio of left-hand circular polarization at a frequency of 14.2GHz in accordance with an embodiment of the invention.
Detailed Description
The invention is further described below with reference to the following figures and specific examples.
Referring to fig. 1, the present invention includes a main mirror 1 and a sub transmission mirror 3 fixed at a half focal length position of the main mirror 1 by a support structure 2 of a non-metallic material; the main reflector 1 is superposed with the central normal of the secondary transmission mirror 3; a feed source 4 is fixed at the hollow position of the center of the main reflector 1, and the phase center of the feed source 4 is superposed with the center position of the main reflector 1; the feed source 4 adopts a rectangular horn antenna structure.
Referring to fig. 2, the main reflector 1 includes a square first dielectric substrate 11 with a hollow center; the first dielectric substrate 11 is a dielectric substrate with the caliber dimension of 156mm multiplied by 156mm, the thickness of 3mm and the dielectric constant of 3.5;
the upper surface of the first dielectric substrate 11 is printed with 30 × 30 periodically arranged square ring-shaped metal patches 111 with double openings, and the lower surface is printed with a first metal floor 112; the distance between the center positions of two adjacent square annular metal patches 111 is 5mm, and it can be seen that the aperture of the whole row formed by the periodically arranged square annular metal patches 111 with double openings is 150mm × 150mm, which is slightly smaller than the aperture of the first dielectric substrate 11, and the aperture of the first dielectric substrate 11 is selected to be 156mm × 156mm so as to match with the size of the secondary transmission mirror 3;
the square-ring-shaped metal patch 111 with the double openings is characterized in that two openings are arranged on one pair of opposite corners of the square ring, two V-shaped metal patches 1111 on the other pair of opposite corners of the square ring form a double-V-shaped structure, and a rectangular metal strip 1112 is connected between the two V-shaped metal patches 1111 in the double-V-shaped structure; the size of the square annular metal patch 111 is as follows:
w is 0.3 mm; the rotation direction and the opening size of the square annular metal patch 111 with the double openings are compensated by the phase compensation value phi of the position of the square annular metal patchP(x, y) determination of phiPThe formula for the calculation of (x, y) is:
where k is the wave number in free space, (x, y) are the central coordinates of the square annular metal patch 111 with double openings, f is the focal length of the main mirror 1 and f is1＝135mm，Φ0Is an arbitrary constant phase value. When the rotation direction of the square ring-shaped metal patch 111 is-45 ° and the opening size d is changed from 1mm to 5mm, the phase of the square ring-shaped metal patch 111 is changed to [ -5 °, 179 ° ]](ii) a When the rotation direction of the square ring-shaped metal patch 111 is β +45 ° and the opening size d is changed from 1mm to 5mm, the phase of the square ring-shaped metal patch 111 is changed to [ -180 °, 5 ° ]](ii) a The square annular metal patches 111 with the rotation directions of-45 degrees and +45 degrees are combined to realize the phase change of 360 degrees, and the phase compensation value phi is obtained according to the position of each square annular metal patch 111P(x, y), and the phase of the square-ring shaped metal patch 111 itself is compared, whereby the rotation direction and the opening size of each square-ring shaped metal patch 111 can be determined.
Referring to fig. 3, the secondary transmission mirror 3 includes a second dielectric substrate 31 and a third dielectric substrate 32 stacked up and down, and the second dielectric substrate 31 and the third dielectric substrate 32 both use dielectric substrates with aperture dimensions of 156mm × 156mm, a thickness of 1.5mm, and a dielectric constant of 3.5;
13 × 13 first circular metal patches 311 which are periodically arranged are printed on the upper surface of the second dielectric substrate 31, the distance between the center positions of two adjacent first circular metal patches 311 is 12mm, and a second circular metal patch 312 is printed at the intersection position of every four first circular metal patches 311, so that an array comprising 12 × 12 second circular metal patches 312 is formed;
a rectangular notch is etched at each of two intersection positions of any diameter of the first circular metal patch 311 and any diameter of the second circular metal patch 312 and the circumference, so as to realize the dual-frequency dual-circular polarization radiation characteristic, C-shaped gaps are etched at the central positions of the first circular metal patch 311 and the second circular metal patch 312, and the opening directions of the C-shaped gap on the first circular metal patch 311 and the C-shaped gap on the second circular metal patch 312 can be selected to be any direction, but the opening directions of the first circular metal patch 311 and the second circular metal patch 312 are ensured to be perpendicular to each other;
the radius of the first circular metal patch 311 is 3.2mm, and the size of the rectangular gap is d1＝0.51mm,d2The outer diameter and the inner diameter of the C-shaped gap are respectively 1.75mm and 1.45mm, and the opening of the C-shaped gap is 0.8 mm; the radius of the second circular metal patch 312 is 2.7mm, and the size of the rectangular gap is d3＝0.22mm,d4The outer diameter and the inner diameter of the C-shaped gap are respectively 1.45mm and 1.15mm, and the opening of the C-shaped gap is 1.0 mm;
a second metal floor 313 is printed on the lower surface of the second dielectric substrate 31, a leaky wave gap 3131 is etched at the corresponding positions of the second metal floor 313, the first circular metal patch 311 and the second circular metal patch 312, and the radius of the leaky wave gap 3131 is 0.4 mm;
a third circular metal patch 321 is printed at the projection position of each first circular metal patch 311 on the lower surface of the third dielectric substrate 32, a fourth circular metal patch 322 is printed at the projection position of each second circular metal patch 312, C-shaped gaps are etched at the center positions of the third circular metal patch 321 and the fourth circular metal patch 322 respectively, and the opening directions of the C-shaped gaps on the third circular metal patch 321 and the fourth circular metal patch 322 are the same; the radius of the third circular metal patch 321 is 3.2mm, the outer diameter and the inner diameter of the C-shaped gap are 1.75mm and 1.45mm respectively, and the opening of the C-shaped gap is 0.8 mm; the radius of the fourth circular metal patch 322 is 2.7mm, the outer diameter and the inner diameter of the C-shaped gap are 1.45mm and 1.15mm respectively, and the opening of the C-shaped gap is 1.0 mm;
preferably, when the opening direction of the C-shaped slot on the third circular metal patch 321 is the same as the opening direction of the C-shaped slot on the first circular metal patch 311, and the opening direction of the C-shaped slot on the fourth circular metal patch 322 is perpendicular to the opening direction of the C-shaped slot on the second circular metal patch 312, the sub-transmission mirror 3 will obtain the best dual-frequency dual-circular polarization characteristic;
the first circular metal patch 311 and the third circular metal patch 321 at the corresponding position thereof, and the second circular metal patch 312 and the fourth circular metal patch 322 at the corresponding position thereof are connected through a metalized through hole 33 passing through the leaky wave slot 3131, and the radius of the metalized through hole 33 is 0.2 mm;
the central normal lines of the first circular metal patch 311 and the third circular metal patch 321 are overlapped; the center normal of the third circular metal patch 312 coincides with the center normal of the fourth circular metal patch 322.
The working principle of the invention is as follows:
1. the function of the main mirror 1 will first be described: the annular metal patch 111 above the main reflector 1 can convert the linearly polarized electromagnetic wave from the feed source 4 into the cross linearly polarized electromagnetic wave; meanwhile, when the annular metal patches 111 above the main reflector 1 are arranged in a gradient manner according to the phase compensation values thereof, spherical waves radiated by the feed source are converted into plane waves.
2. Next, the function of the sub-transmission mirror 3 will be described: under the excitation of low-frequency linear polarized waves, the third circular metal patch 321 can couple the received electromagnetic waves to the first circular metal patch 311 through the metalized via hole 33, so that the conversion from linear polarization to right-hand circular polarization is realized; under the excitation of high-frequency linear polarized waves, the fourth circular metal patch 322 can couple the received electromagnetic waves to the second circular metal patch 312 through the metalized via hole 33, so that the conversion from linear polarization to left-hand circular polarization is realized; meanwhile, the sub-transmission mirror 3 can perfectly reflect the orthogonal linear polarization electromagnetic wave.
3. When the main reflector 1 is combined with the auxiliary transmission mirror 3, linear polarized waves from the feed source are totally reflected when being irradiated to the auxiliary transmission mirror 3 and are irradiated to the main reflector 1, the linear polarized waves are converted into orthogonal linear polarized waves through the main reflector 1, the conversion from spherical waves to plane waves is realized, finally the orthogonal linear polarized waves are transmitted out from the auxiliary transmission mirror 3, right-hand circular polarized radiation is realized at low frequency, and left-hand circular polarized radiation is realized at high frequency.
The technical effects of the present invention will be further explained by simulation experiments.
1. Simulation conditions and contents.
The above embodiments were simulated using the commercial simulation software CST Microwave Studio.
Simulation 1, which simulates the reflection coefficient of the specific embodiment at 11.9 GHz-12.9 GHz, and the result is shown in fig. 4;
simulation 2, a two-dimensional radiation gain curve of the specific embodiment at a frequency of 12.5GHz is simulated, and the result is shown in fig. 5 and 6;
simulation 4, which simulates the reflection coefficient of the specific embodiment at 14.0GHz to 14.6GHz, and the result is shown in fig. 8;
simulation 6, which is to simulate the axial ratio curve of the specific embodiment at the frequency of 14.2GHz, and the result is shown in fig. 11;
2. and (5) analyzing a simulation result.
Referring to fig. 4, the reflection coefficient of the folded reflective array antenna is shown, and a simulation result shows that the reflection coefficient is lower than-10 dB in a frequency band range of 11.95-12.80 GHz, which shows that the antenna can realize good matching in the frequency band range;
referring to fig. 5 and 6, showing far-field directional patterns of the folded reflective array antenna, simulation results show that right-hand circular polarization realizes better high-gain radiation, left-hand circular polarization waves are completely suppressed, the maximum gains of the right-hand circular polarization under the E plane and the H plane are both 22.7dBic, and the maximum gains of the left-hand circular polarization under the E plane and the H plane are 4.17 dBic;
referring to fig. 7, an axial ratio corresponding to a right-hand circularly polarized beam of the folded reflective array antenna is shown, and a simulation result shows that the axial ratio under the E plane and the H plane is 1.57dB, which shows that the folded reflective array antenna realizes perfect right-hand circularly polarized radiation under a low frequency condition;
referring to fig. 8, the reflection coefficient of the folded reflective array antenna is shown, and a simulation result shows that the reflection coefficient is lower than-10 dB in a frequency band range of 14.04-14.53 GHz, which shows that the antenna can realize good matching in the frequency band range;
referring to fig. 9 and 10, showing far-field pattern of the folded reflective array antenna, simulation results show that the left-hand circular polarization realizes better high-gain radiation, the right-hand circular polarization wave is completely suppressed, the maximum gains of the left-hand circular polarization under the E-plane and the H-plane are both 24.5dBic, and the maximum gains of the right-hand circular polarization under the E-plane and the H-plane are 2.4 dBic;
referring to fig. 11, an axial ratio corresponding to a left-hand circularly polarized beam of the folded reflective array antenna is shown, and a simulation result shows that the axial ratio of the E-plane and the H-plane is 1.37dB, which shows that the folded reflective array antenna realizes perfect left-hand circularly polarized radiation under a high-frequency condition.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the innovative concept of the present invention, but these changes and modifications are within the scope of the present invention.
Claims (5)
1. A dual-frequency dual-circular polarization folding reflective array antenna is characterized in that: the device comprises a main reflector (1) and a secondary transmission mirror (3) which is fixed at one-half focal length position of the main reflector (1) through a support structure (2) made of non-metal materials, wherein:
the main reflector (1) comprises a square first medium substrate (11) with a hollow center, wherein M multiplied by N periodically arranged square annular metal patches (111) with double openings are printed on the upper surface of the first medium substrate (11), M is more than or equal to 8, N is more than or equal to 8, and the rotation direction and the opening size of each square annular metal patch (111) pass through the phase compensation value phi of the position of the square annular metal patchP(x, y) determining that the lower surface of the first medium substrate (11) is printed with a first metal floor (112);
the secondary transmission mirror (3) comprises a second dielectric substrate (31) and a third dielectric substrate (32) which are stacked up and down; the upper surface of the second medium substrate (31) is printed with P × Q first circular metal patches (311) which are periodically arranged, and a second circular metal patch (312) is printed at the intersection point position of every four first circular metal patches (311) to form an array comprising R × S second circular metal patches (312), wherein P is less than or equal to M, Q is less than or equal to N, R is P-1, and S is Q-1; a rectangular notch is etched at each of two intersection positions of any diameter of the first circular metal patch (311) and any diameter of the second circular metal patch (312) and the circumference, so that the dual-frequency dual-circular polarization radiation characteristic is realized, C-shaped gaps are etched at the central positions of the first circular metal patch (311) and the second circular metal patch (312), and the C-shaped gaps on the first circular metal patch (311) are vertical to the opening direction of the C-shaped gaps on the second circular metal patch (312); a second metal floor (313) is printed on the lower surface of the second dielectric substrate (31), and a leaky wave gap (3131) is etched in the second metal floor (313) and the corresponding positions of the first circular metal patch (311) and the second circular metal patch (312); a third circular metal patch (321) is printed at the projection position of each first circular metal patch (311) on the lower surface of the third medium substrate (32), a fourth circular metal patch (322) is printed at the projection position of each second circular metal patch (312), C-shaped gaps are etched at the central positions of the third circular metal patch (321) and the fourth circular metal patch (322), and the opening directions of the C-shaped gaps on the third circular metal patch (321) and the fourth circular metal patch (322) are the same; the first circular metal patch (311) and a third circular metal patch (321) at a corresponding position thereof, and the second circular metal patch (312) and a fourth circular metal patch (322) at a corresponding position thereof are connected through a metalized through hole (33) penetrating through the leaky wave gap (3131);
the feed source (4) is fixed at the hollow position of the center of the main reflector (1), and the phase center of the feed source (4) is superposed with the center position of the main reflector (1).
2. The dual-band dual-circular polarization folded reflective array antenna of claim 1, wherein: the main reflecting mirror (1) is superposed with the center normal of the sub transmission mirror (3).
3. The dual-band dual-circular polarization folded reflective array antenna of claim 1, wherein: the metal patch (111) is provided with two openings, two openings are arranged on one pair of opposite corners of the square ring, two V-shaped metal patches (1111) on the other pair of opposite corners of the square ring form a double V-shaped structure, and a rectangular metal strip (1112) is connected between the two V-shaped metal patches (1111) in the double V-shaped structure; the phase compensation value phi of the position of the square annular metal patch (111) with the double openingsPThe formula for the calculation of (x, y) is:
wherein k is the wave number in free space, (x, y) are the central coordinates of the square annular metal patch (111) with double openings, f is the focal length of the main reflector (1), phi0Is an arbitrary constant phase value.
4. The dual-band dual-circular polarization folded reflective array antenna of claim 1, wherein: the specification of the first circular metal patch (311) is the same as that of the third circular metal patch (321), the specifications of C-shaped gaps etched on the first circular metal patch (311) and the third circular metal patch (321) are the same, and the central normal lines of the first circular metal patch (311) and the third circular metal patch (321) are superposed; the specification of the third circular metal patch (312) is the same as that of the fourth circular metal patch (322), the specification of a C-shaped gap etched on the third circular metal patch (312) is the same as that of a C-shaped gap etched on the fourth circular metal patch (322), and the central normal lines of the third circular metal patch (312) and the fourth circular metal patch (322) are superposed.
5. The dual-band dual-circular polarization folded reflective array antenna of claim 1, wherein: the feed source (4) adopts a rectangular horn antenna structure.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114465013A (en) * | 2022-02-21 | 2022-05-10 | 西安电子科技大学 | Spherical conformal dual-circular-polarization dual-beam antenna based on anisotropic holographic super surface |
| CN114725695A (en) * | 2022-04-08 | 2022-07-08 | 重庆邮电大学 | Novel ultra-thin all-metal dual-frequency transmission and reflection integrated array antenna unit |
| CN114824834A (en) * | 2022-06-29 | 2022-07-29 | 电子科技大学 | Fully-integrated large-frequency-ratio double-frequency double-fed folded reflective array antenna |
| CN115347379A (en) * | 2022-10-19 | 2022-11-15 | 银河航天(西安)科技有限公司 | Antenna |
| CN115377699A (en) * | 2022-09-15 | 2022-11-22 | 南京理工大学 | Low-profile transmission array antenna based on polarization torsion unit |
| CN116435761A (en) * | 2023-06-14 | 2023-07-14 | 南京邮电大学 | Dual circular polarization reflective array antenna and independent control method for radiation beam thereof |
| CN118572390A (en) * | 2024-08-02 | 2024-08-30 | 南京理工大学 | All-metal double-circular polarization reflection array antenna |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5872018B1 (en) * | 2014-12-19 | 2016-03-01 | 電気興業株式会社 | Dual-polarized antenna device |
| CN107134654A (en) * | 2017-04-21 | 2017-09-05 | 南京航空航天大学 | Double-frequency double-circularly-poantenna antenna and its performance implementation method based on the super surface of electromagnetism |
| CN110911831A (en) * | 2019-11-27 | 2020-03-24 | 西安电子科技大学 | Double-frequency circularly polarized planar transmission array antenna adopting single-wire polarized feed source |
| CN111541031A (en) * | 2020-04-16 | 2020-08-14 | 华南理工大学 | Broadband low-profile transmission array antenna and wireless communication equipment |
| CN113036414A (en) * | 2021-03-09 | 2021-06-25 | 中国电子科技集团公司第五十四研究所 | Low-scattering dual-frequency circularly polarized microstrip antenna |
-
2021
- 2021-11-12 CN CN202111341584.5A patent/CN114069256B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5872018B1 (en) * | 2014-12-19 | 2016-03-01 | 電気興業株式会社 | Dual-polarized antenna device |
| CN107134654A (en) * | 2017-04-21 | 2017-09-05 | 南京航空航天大学 | Double-frequency double-circularly-poantenna antenna and its performance implementation method based on the super surface of electromagnetism |
| CN110911831A (en) * | 2019-11-27 | 2020-03-24 | 西安电子科技大学 | Double-frequency circularly polarized planar transmission array antenna adopting single-wire polarized feed source |
| CN111541031A (en) * | 2020-04-16 | 2020-08-14 | 华南理工大学 | Broadband low-profile transmission array antenna and wireless communication equipment |
| CN113036414A (en) * | 2021-03-09 | 2021-06-25 | 中国电子科技集团公司第五十四研究所 | Low-scattering dual-frequency circularly polarized microstrip antenna |
Non-Patent Citations (2)
| Title |
|---|
| PEI YANG等: "High-purity polarized multi-beams from polarization-twisting meta-surface Cassegrain systems", 《OPTICS EXPRESS》, vol. 28, no. 4, 10 February 2020 (2020-02-10), pages 5200 - 5211 * |
| 赵西贝: "宽带折叠反射阵天线设计", 《中国优秀硕士学位论文全文数据库（电子期刊）》, 15 May 2021 (2021-05-15) * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114465013A (en) * | 2022-02-21 | 2022-05-10 | 西安电子科技大学 | Spherical conformal dual-circular-polarization dual-beam antenna based on anisotropic holographic super surface |
| CN114465013B (en) * | 2022-02-21 | 2023-06-30 | 西安电子科技大学 | Spherical conformal dual-circularly polarized dual-beam antenna based on anisotropic holographic super surface |
| CN114725695A (en) * | 2022-04-08 | 2022-07-08 | 重庆邮电大学 | Novel ultra-thin all-metal dual-frequency transmission and reflection integrated array antenna unit |
| CN114725695B (en) * | 2022-04-08 | 2024-05-24 | 重庆邮电大学 | Ultra-thin all-metal dual-frequency transmission and reflection integrated array antenna unit |
| CN114824834A (en) * | 2022-06-29 | 2022-07-29 | 电子科技大学 | Fully-integrated large-frequency-ratio double-frequency double-fed folded reflective array antenna |
| CN114824834B (en) * | 2022-06-29 | 2022-10-14 | 电子科技大学 | Fully-integrated large-frequency-ratio double-frequency double-fed folded reflective array antenna |
| CN115377699A (en) * | 2022-09-15 | 2022-11-22 | 南京理工大学 | Low-profile transmission array antenna based on polarization torsion unit |
| CN115347379A (en) * | 2022-10-19 | 2022-11-15 | 银河航天(西安)科技有限公司 | Antenna |
| CN115347379B (en) * | 2022-10-19 | 2023-01-31 | 银河航天(西安)科技有限公司 | Antenna |
| CN116435761A (en) * | 2023-06-14 | 2023-07-14 | 南京邮电大学 | Dual circular polarization reflective array antenna and independent control method for radiation beam thereof |
| CN116435761B (en) * | 2023-06-14 | 2024-02-06 | 南京邮电大学 | Dual circular polarization reflective array antenna and independent control method for radiation beam thereof |
| CN118572390A (en) * | 2024-08-02 | 2024-08-30 | 南京理工大学 | All-metal double-circular polarization reflection array antenna |
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