CN116845571B - Wide-angle scanning circular polarization brick type phased array - Google Patents
Wide-angle scanning circular polarization brick type phased array Download PDFInfo
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- CN116845571B CN116845571B CN202311014006.XA CN202311014006A CN116845571B CN 116845571 B CN116845571 B CN 116845571B CN 202311014006 A CN202311014006 A CN 202311014006A CN 116845571 B CN116845571 B CN 116845571B
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- circular polarization
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- decoupling
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- 230000010287 polarization Effects 0.000 title claims abstract description 64
- 239000011449 brick Substances 0.000 title claims abstract description 48
- 238000003491 array Methods 0.000 claims abstract description 25
- 239000002184 metal Substances 0.000 claims abstract description 22
- 238000002955 isolation Methods 0.000 claims abstract description 19
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 230000008878 coupling Effects 0.000 abstract description 9
- 238000010168 coupling process Methods 0.000 abstract description 9
- 238000005859 coupling reaction Methods 0.000 abstract description 9
- 230000006866 deterioration Effects 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 230000005855 radiation Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/06—Waveguide mouths
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a wide-angle scanning circular polarization brick type phased array, which mainly solves the problem that the axial ratio is difficult to maintain during wide-angle scanning of the existing circular polarization brick type phased array. The phased array consists of a brick type circular polarization linear array, a comb-shaped decoupling structure and a metal isolation plate; the brick type circular polarization linear arrays are periodically and repeatedly arranged on the upper side and the lower side of the metal isolation plate along the x direction, and comb-shaped decoupling structures are arranged in gaps of adjacent brick type circular polarization linear arrays; the comb-shaped decoupling structure is used for breaking the high-order mode generation condition in the gap to realize decoupling in the x direction, and meanwhile, the comb-shaped coupling structure does not support a propagation mode along the y direction to realize decoupling in the y direction; the metal isolation plate is used for isolating the upper part and the lower part of the brick type circular polarization linear array. The invention solves the problem of large-angle scanning axial ratio deterioration faced by the existing circularly polarized brick type phased array, has simple implementation mode and realizes two-dimensional decoupling by one structure.
Description
Technical Field
The invention belongs to the technical field of circularly polarized phased array antennas, and particularly relates to a wide-angle scanning circularly polarized brick type phased array.
Background
In recent years, satellite communication technology covering the world has become a new hotspot, and people will be led to the era of 6G wisdom alliance. In order to realize larger available bandwidth, K/Ka frequency band is taken as a main use frequency band of a high-flux satellite in China, and the problem of signal attenuation caused by rainwater and Faraday rotation is also brought while the larger bandwidth is brought, so that the satellite communication in the Ka frequency band adopts circularly polarized electromagnetic waves to resist the attenuation. The circularly polarized brick type phased array has the advantages of wide bandwidth and abundant wiring area, and is a preferred scheme for constructing the circularly polarized phased array by using a separating device.
In the occasions of low orbit satellite communication, communication in motion and the like, the satellite communication system puts further demands on the scanning range and quality of the terminal beam. Taking the case of the in-motion communication, it is generally required that the circularly polarized beam have a scan range of ±60 degrees. However, the conventional circular polarization brick type phased array antenna has many coupling paths and strong coupling due to its three-dimensional structure, and suffers from the problem of deteriorated axial ratio during large-angle scanning, for example, patent "a wide-beam circular polarization phased array antenna" with the authority of CN 203536570U discloses a phased array composed of a middle brick type circular polarization unit, which has a certain scanning capability, but has an axial ratio raised to 10dB at ±60 degrees of scanning angle, and cannot be called circular polarization, essentially due to the fact that decoupling measures are not in place.
Disclosure of Invention
The invention aims to provide a wide-angle scanning circular polarization brick type phased array, which mainly solves the problem that the axial ratio is difficult to maintain during wide-angle scanning of the existing circular polarization brick type phased array.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a wide-angle scanning circular polarization brick type phased array is composed of a brick type circular polarization linear array, a comb decoupling structure and a metal isolation plate; the brick type circular polarization linear arrays are periodically and repeatedly arranged on the upper side and the lower side of the metal isolation plate along the x direction, and comb-shaped decoupling structures are arranged in gaps of adjacent brick type circular polarization linear arrays; the comb-shaped decoupling structure is used for breaking the high-order mode generation condition in the gap to realize decoupling in the x direction, and meanwhile, the comb-shaped coupling structure does not support a propagation mode along the y direction to realize decoupling in the y direction; the metal isolation plate is used for isolating the upper part and the lower part of the brick type circular polarization linear array.
Further, in the invention, the brick type circular polarization linear array is a single-frequency brick type circular polarization linear array.
Further, in the invention, 6 circularly polarized brick-type linear arrays are arranged, the 6 circularly polarized brick-type linear arrays repeatedly appear along the x direction, the distance between every two circularly polarized brick-type linear arrays is d=7.1 mm, each circularly polarized brick-type linear array is composed of 8 radiating units, the 8 radiating units are periodically repeated along the y direction, and the distance between every two radiating units is p=5 mm.
Further, in the invention, the comb-shaped decoupling structure is not contacted with the circular polarization brick type linear array, the width of the comb teeth is 0.2mm, the height is 3.1mm, the length is 1.5mm, the interval between the comb teeth is 2.5mm, and the comb teeth and the center of the radiation unit are coaxial along the x direction.
Further, in the invention, the metal isolation plate is directly connected with the comb teeth of the comb-shaped decoupling structure, the thickness of the metal isolation plate is 2mm, and the metal isolation plate is directly contacted with the circular polarization brick type linear array.
Compared with the prior art, the invention has the following beneficial effects:
the wide-angle scanning circular polarization brick type phased array scheme solves the problem of large-angle scanning axial ratio deterioration faced by the existing circular polarization brick type phased array, and has simple implementation mode and two-dimensional decoupling by using one structure.
Drawings
FIG. 1 is a perspective view of a wide angle scanning circular polarization tile phased array of the present invention.
FIG. 2 is a three-view of a wide angle scanning circular polarization brick type phased array of the present invention.
Fig. 3 is a two-dimensional decoupling principle of the present invention.
Wherein, the names corresponding to the reference numerals are:
101-brick type circular polarization linear array, 102-comb decoupling structure and 103-metal isolation plate.
Detailed Description
The invention will be further illustrated by the following description and examples, which include but are not limited to the following examples.
As shown in fig. 1, the wide-angle scanning circular polarization brick type phased array disclosed by the invention is composed of a brick type circular polarization linear array 101, a comb-shaped decoupling structure 102 and a metal isolation plate 103; the brick type circular polarization linear arrays 101 are periodically and repeatedly arranged along the x direction on the upper side and the lower side of the metal isolation plate 103, and comb-shaped decoupling structures 102 are arranged in gaps of adjacent brick type circular polarization linear arrays 101; the comb-shaped decoupling structure 102 is used for breaking a higher-order mode generation condition in a gap to realize decoupling in the x direction, and meanwhile, the comb-shaped decoupling structure 102 does not support a propagation mode along the y direction to realize decoupling in the y direction; the metal isolation plate is used for isolating the upper part and the lower part of the brick type circular polarization linear array 101. The brick-type circular polarization linear array 101 in this embodiment is a single-frequency brick-type circular polarization linear array.
Fig. 2 is a three-view diagram of a wide-angle scanning circular polarization tile-type phased array in the embodiment of the present invention, in this embodiment, the tile-type circular polarization linear array 101 is provided with 6 pieces, 6 pieces of circular polarization tile-type linear arrays repeatedly appear along the x direction, a distance between every two pieces is d=7.1 mm, each circular polarization tile-type linear array is composed of 8 radiation units, the 8 radiation units are periodically repeated along the y direction, and a distance between every two radiation units is p=5 mm. The comb-shaped decoupling structure 102 is not contacted with the brick-type circular polarization linear array 101, the width of the comb teeth is 0.2mm, the height is 3.1mm, the length is 1.5mm, the interval between the comb teeth is 2.5mm, and the comb teeth and the center of the radiation unit are coaxial along the x direction. The metal isolation plate 103 is directly connected with the comb teeth of the comb-shaped decoupling structure 102, the thickness of the metal isolation plate 103 is 2mm, and the metal isolation plate 103 is directly contacted with the brick-type circularly polarized linear array 101.
Fig. 3 is a two-dimensional decoupling principle according to an embodiment of the present invention, and for the existing circular polarization tile-like phased array, its structural configuration is similar to that of fig. 3a, where the circular polarization tile-like linear arrays are directly expanded along the x-direction, and only metal spacers are provided between adjacent circular polarization tile-like linear arrays. At this time, a high-order slab waveguide mode exists between the two circularly polarized brick type linear arrays, and the electric field direction of the high-order slab waveguide mode is along the y direction and can propagate along the x direction, so that a coupling passage is formed along the x direction, and the xoz plane scanning axis ratio is deteriorated. The metal ridge (as shown in fig. 3 b) is added between the adjacent circular polarization brick type linear arrays, so that the high-order slab waveguide mode can be effectively restrained, but good propagation conditions along the y direction are formed between the metal ridge and the circular polarization brick type linear arrays, so that a coupling passage is formed along the y direction, and the axial ratio of yoz plane large-angle scanning is further deteriorated. According to the invention, the comb-shaped decoupling structure (shown in fig. 3 c) is added between adjacent circular polarization brick type linear arrays, so that on one hand, the comb-shaped decoupling structure destroys the generation condition of a high-order slab waveguide mode, suppresses the coupling in the x direction, and on the other hand, a good propagation condition in the y direction is not formed together with the circular polarization brick type linear arrays, and the coupling in the y direction is suppressed. The coupling of the two dimensions is effectively inhibited, and the two-dimensional large-angle scanning axial ratio is ensured.
Table 1 shows the axial ratio simulation results of three circularly polarized brick phased arrays (fig. 3a, 3b, and 3 c) scanned on xoz, where the simulation results of 29GHz center frequency are shown, and compared with the results of fig. 3a, the axial ratios of 60 degrees scanned on xoz faces of fig. 3b and 3c are all below 3dB, and the circularly polarized effect is good.
Table 1 results of axial ratio simulation of scanning of three circularly polarized brick phased arrays on xoz plane
Fig. 2 is an axial ratio simulation result of scanning the two remaining circular polarization brick type phased arrays (fig. 3b and 3 c) on the yoz plane after excluding fig. 3a, and a simulation result of 29GHz center frequency is still presented here, and compared with fig. 3b, the axial ratio of scanning the circular polarization brick type phased arrays on the yoz plane at a large angle of 60 degrees is below 3dB, and the circular polarization effect is good.
Table 2 results of axial ratio simulation of two circularly polarized tile phased arrays (fig. 3b, 3 c) scanned at yoz
Through the design, the invention solves the problem of large-angle scanning axial ratio deterioration faced by the existing circularly polarized brick type phased array, has simple implementation mode, and realizes two-dimensional decoupling by one structure. Thus, the present invention provides a significant and substantial advance over the prior art.
The above embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or color changes made in the main design concept and spirit of the present invention are still consistent with the present invention, and all the technical problems to be solved are included in the scope of the present invention.
Claims (5)
1. The wide-angle scanning circular polarization brick type phased array is characterized by comprising a brick type circular polarization linear array (101), a comb-shaped decoupling structure (102) and a metal isolation plate (103); the brick type circular polarization linear arrays (101) are periodically and repeatedly arranged on the upper side and the lower side of the metal isolation plate (103) along the x direction, and comb-shaped decoupling structures (102) are arranged in gaps of adjacent brick type circular polarization linear arrays (101); the comb-shaped decoupling structure (102) is used for breaking a higher-order mode generation condition in a gap to realize decoupling in the x direction, and meanwhile, the comb-shaped decoupling structure (102) does not support a propagation mode along the y direction to realize decoupling in the y direction; the metal isolation plate is used for isolating the upper part and the lower part of the brick type circular polarization linear array (101).
2. A wide angle scanning circular polarization phased array according to claim 1, characterized in that the circular polarization linear array (101) is a single frequency circular polarization linear array.
3. A wide angle scanning circular polarization tile array according to claim 1 or 2, characterized in that the tile-shaped circular polarization linear array (101) is provided with 6, 6 circular polarization tile-shaped linear arrays repeatedly appear along the x-direction, the distance between every two is d = 7.1mm, each circular polarization tile-shaped linear array is composed of 8 radiating elements, the 8 radiating elements are periodically repeated along the y-direction, and the distance between every two radiating elements is p = 5mm.
4. A wide angle scanning circular polarized phased array as claimed in claim 3 wherein the comb decoupling structure (102) is non-contacting the circular polarized array (101) with comb teeth having a width of 0.2mm, a height of 3.1mm, a length of 1.5mm, a spacing of 2.5mm between the comb teeth, and the comb teeth being coaxial with the radiating element center in the x-direction.
5. A wide angle scanning circular polarization phased array according to claim 4, characterized in that the metallic spacer (103) is directly connected to the teeth of the comb-like decoupling structure (102), the metallic spacer (103) has a thickness of 2mm, and the metallic spacer (103) is in direct contact with the circular polarization phased array (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311014006.XA CN116845571B (en) | 2023-08-11 | 2023-08-11 | Wide-angle scanning circular polarization brick type phased array |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311014006.XA CN116845571B (en) | 2023-08-11 | 2023-08-11 | Wide-angle scanning circular polarization brick type phased array |
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| Publication Number | Publication Date |
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| CN116845571A CN116845571A (en) | 2023-10-03 |
| CN116845571B true CN116845571B (en) | 2023-12-22 |
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| CN112072294A (en) * | 2020-08-28 | 2020-12-11 | 电子科技大学 | Broadband low-profile high-isolation dual-circular-polarization two-dimensional wide-angle scanning sparse array |
| CN212783802U (en) * | 2020-09-15 | 2021-03-23 | 成都菲斯洛克电子技术有限公司 | S-band high-gain wide-angle scanning phased array antenna |
| US11223126B1 (en) * | 2018-03-01 | 2022-01-11 | Lockheed Martin Corporation | Combined cross-link and communication-link phased array for satellite communication |
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| US7427949B2 (en) * | 2005-12-05 | 2008-09-23 | M/A-Com, Inc. | System and method of using absorber-walls for mutual coupling reduction between microstrip antennas or brick wall antennas |
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