CN117239441A - Circular polarization phased array antenna loaded with independent inductive matching junctions - Google Patents
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Abstract
The invention belongs to the technical field of common-caliber circular polarization phased array antennas, and particularly relates to a circular polarization phased array antenna loaded with independent inductive matching junctions, which comprises a high-frequency brick type circular polarization linear array, a low-frequency brick type circular polarization linear array, a strip line filter, the independent inductive matching junctions, an air column gap and a metal floor, wherein the independent inductive matching junctions are respectively arranged below the high-frequency brick type circular polarization linear array and the low-frequency brick type circular polarization linear array radiator; the discontinuity is introduced into the medium substrate through the air column gap, so that surface waves between adjacent units of the high-frequency antenna caused by the low-frequency antenna under the condition of large-angle scanning are restrained, phase mutation of horizontal components of re-radiated electromagnetic waves is eliminated, and the wide-band of the antenna for large-angle scanning is realized; and secondly, the independent inductive matching junction separates the impedance matching and radiation performance regulation and control mechanisms of the antenna by utilizing the self-sealing characteristic of the SIW structure, realizes independent regulation and control of the two, and deconstructs the optimal design process of the circularly polarized common-caliber antenna.
Description
Technical Field
The invention belongs to the technical field of co-aperture circular polarization phased array antennas, and particularly relates to a co-aperture wide-bandwidth angle scanning circular polarization brick type phased array.
Background
With the rapid development of low-orbit satellite communication, a satellite communication technology covering the world becomes a new hot spot, and in order to realize the prospect of creating uninterrupted, seamless and high-throughput connection anywhere, earth Orbit Satellites (LEOs) become a preferred scheme for efficient communication due to the characteristics of shorter signal transmission paths and smaller signal delay and power loss. Research institutions and operators at home and abroad develop related technical research and commercial popularization aiming at a low-orbit satellite communication system. With the rapid development of wireless communication technology, the spectrum resources of the low frequency band are more and more crowded, and the channel capacity is difficult to meet the design requirements at the present stage. In order to meet the requirements of high-speed and high-quality transmission and communication, research and design of a communication system capable of working in a millimeter wave frequency band with abundant frequency spectrum resources are urgently needed. 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, so that the Faraday rotation effect and the multipath effect are overcome when electromagnetic waves pass through an ionosphere during communication between the satellite and the ground while the bandwidth is widened, and high-quality satellite link and information transmission are ensured, and therefore, a receiving and transmitting antenna is required to work in a circular polarization radiation mode. In addition, although LEO has low orbit characteristics that shorten the satellite-ground transmission distance and reduce free space loss, the requirement for the antenna to have wide angle scanning capability is also raised, and the coverage angle to ground is usually not less than ±60 degrees. Secondly, for the LEO high dynamic motion characteristics, the ground terminal must have satellite tracking capability similar to "communication in motion". In addition, considering the huge constellation scale, in order to ensure continuous service in the low orbit satellite motion process, the user terminal serving the LEO constellation must have the capability of supporting fast adjustment of beam pointing of cross-satellite switching, and in order to realize service continuity in the switching process, the time for adjusting the beam pointing should be controlled to be in us order or even lower, and only an electronically controlled scanning phased array can well match the fast beam switching requirement. Finally, the rapid development of satellite communication technology increasingly puts more and more demands on satellite antennas, and in order to meet the restrictions of satellite carrying platforms on weight and size, the satellite communication multifunctional integration is realized, and antennas with multiple frequency bands are usually required to be carried on a smaller antenna caliber area to work simultaneously. The common-caliber 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. The existing partial common-caliber circularly polarized brick type phased array antenna has normal broadband and large-angle scanning capability, but has the problem that the radiation performance and impedance matching are affected mutually, and the problem that the radiation performance and the impedance matching are affected mutually is solved, so that the bandwidth performance of the partial common-caliber circularly polarized brick type phased array antenna cannot be maintained under the condition of large-angle scanning due to the limitation of the improvement of the performance. The design needs to consider the factors of too many interactions at the same time, which is also a problem faced by the common aperture circular polarization technology.
Disclosure of Invention
The invention aims to provide a circular polarization phased array antenna loaded with independent inductive matching junctions, which mainly solves the problems of multiple variable multi-objective optimization problems faced by the prior common-caliber circular polarization brick type phased array when caliber fusion design is carried out and the problem that the common-caliber circular polarization antenna is difficult to maintain axial ratio bandwidth when scanning at a large angle.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the circular polarization phased array antenna loaded with the independent inductive matching junctions comprises a high-frequency brick type circular polarization linear array, a low-frequency brick type circular polarization linear array, a strip line filter, the independent inductive matching junctions, air column gaps and a metal floor, wherein the high-frequency brick type circular polarization linear array and the low-frequency brick type circular polarization linear array are respectively and alternately and repeatedly arranged at the two sides of the metal floor along the x direction, the independent inductive matching junctions are respectively arranged below the high-frequency brick type circular polarization linear array and the low-frequency brick type circular polarization linear array radiator, the air column gaps are arranged at the two sides of a radiation unit of the high-frequency brick type circular polarization linear array, and the strip line filter is arranged at a feeding structure of the low-frequency brick type circular polarization linear array; the independent inductive matching junction realizes independent regulation and control of antenna radiation performance and impedance matching by means of self-sealing characteristics of the SIW structure; the air column gap is used for introducing discontinuity in the medium substrate so as to inhibit surface waves between adjacent units under large-angle scanning; the strip line filter is used for improving the isolation of the port and simultaneously is used as a reflector when the high-frequency unit radiates; the metal floor is used as a reflector of a high-frequency brick type circular polarization linear array and a low-frequency brick type circular polarization linear array.
The high-frequency brick type circular polarization linear arrays and the low-frequency brick type circular polarization linear arrays are periodically and alternately and repeatedly arranged on two sides of the metal floor along the x direction; setting air column gaps in gaps of adjacent high-frequency circularly polarized units to inhibit generation of surface waves under large-angle scanning; the stripline filter improves the isolation of the port and is used as a reflector when the high-frequency unit radiates; the metal floor serves as a reflector for both frequency band units; the independent inductive matching junction is used for realizing independent regulation and control of radiation performance and impedance matching of the common-caliber circularly polarized antenna, and simplifying the design process.
Optionally, the high-frequency brick type circular polarization linear array and the low-frequency brick type circular polarization linear array are both single-frequency brick type circular polarization linear arrays.
Optionally, the high-frequency brick type circular polarization linear array and the low-frequency brick type circular polarization linear array are provided with 8 high-frequency brick type circular polarization linear arrays and 8 low-frequency brick type circular polarization linear arrays which alternately and repeatedly appear along the x direction, the distance between every two high-frequency brick type circular polarization linear arrays is d=2.5 mm, each low-frequency brick type circular polarization linear array is composed of 8 radiation units, the 8 radiation units are periodically repeated along the y direction, and the distance between every two radiation units is p 1 =7.5 mm. Each high-frequency brick type circular polarization linear array consists of 12 radiating units, 12 radiating units are periodically repeated along the y direction, and the interval between every two radiating units is p 2 ＝5mm。
Optionally, the independent inductive matching junctions are positioned in each radiating unit in the high-frequency brick type circular polarization linear array and the low-frequency brick type circular polarization linear array, each radiating unit internally comprises one or more pairs of independent inductive matching junctions, the width of each independent inductive matching junction in the low-frequency brick type circular polarization linear array is 3.1mm, and the width of each independent inductive matching junction in the high-frequency brick type circular polarization linear array is 4.7mm.
Optionally, the air column gaps are positioned at two sides of each radiation unit of the high-frequency brick type circular polarization linear array, the diameter of the air column is 0.3mm, and the total length of the air column is 4.1mm.
Optionally, the metal floor is located between and attached to the high-frequency brick type circular polarization linear array and the low-frequency brick type circular polarization linear array, and the thickness of the metal floor is 5mm.
Compared with the prior art, the invention has the following beneficial effects:
the scheme of the circular polarization phased array antenna loading the independent inductive matching junction solves the problems of multiple variable multi-objective optimization problems faced by the prior common-caliber circular polarization brick type phased array in caliber fusion design and the problem that the common-caliber circular polarization antenna is difficult to maintain the axial ratio bandwidth in large-angle scanning, and has simple implementation mode.
The specific implementation mode is as follows: the air column gap 105 suppresses surface waves between adjacent units of the high-frequency antenna caused by the low-frequency antenna under the large-angle scanning by introducing discontinuity in the medium substrate, eliminates phase mutation of horizontal components of re-radiated electromagnetic waves, and realizes the broadband of the antenna for the large-angle scanning; the independent inductive matching junction 104 separates the impedance matching and radiation performance regulation and control mechanisms of the antenna by utilizing the self-sealing characteristic of the SIW structure, realizes independent regulation and control of the two, and deconstructs the optimal design process of the circularly polarized common-caliber antenna.
Drawings
FIG. 1 is a perspective view and a metal layer plan view of a circularly polarized phased array antenna loaded with independent inductive matching junctions in accordance with the present invention;
FIG. 2 is a three-view of a circularly polarized phased array antenna loaded with independent inductive matching junctions in accordance with the present invention;
FIG. 3 is a graph showing the effect of the independent inductive matching junction structure of the present invention on the impedance matching of an antenna;
FIG. 4 is a graph showing the effect of the independent inductive matching junction structure of the present invention on the radiation performance of an antenna;
fig. 5 illustrates the containment effect of space column gaps in a high frequency antenna on surface waves between radiating elements of the high frequency antenna during high angle scanning of the low frequency antenna.
Wherein, the names corresponding to the reference numerals are:
101-high-frequency brick type circular polarization linear array, 102-low-frequency brick type circular polarization linear array, 103-strip line filter, 104-independent inductive matching junction, 105-air column gap and 106-metal floor.
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 present embodiment provides a circular polarization phased array antenna loaded with independent inductive matching junctions, which is composed of a high-frequency brick type circular polarization linear array 101, a low-frequency brick type circular polarization linear array 102, a strip line filter 103, independent inductive matching junctions 104, an air column gap 105 and a metal floor 106; the high-frequency brick type circular polarization linear array 101 and the low-frequency brick type circular polarization linear array 102 are periodically and alternately and repeatedly arranged along the x direction at two sides of the metal floor 106 respectively, and independent inductive matching junctions 104 are respectively arranged below the radiators of the high-frequency brick type circular polarization linear array 101 and the low-frequency brick type circular polarization linear array 102; air column gaps 105 are formed on two sides of the radiating unit of the high-frequency brick type circularly polarized linear array 101; the independent inductive matching junction 104 separates the impedance matching and radiation performance regulation and control mechanisms of the antenna by utilizing the self-sealing characteristic of the SIW structure, realizes independent regulation and control of the two, and deconstructs the optimal design process of the circularly polarized common-caliber antenna; the air column gap 105 is formed by introducing discontinuity in the dielectric substrate so as to inhibit surface waves between adjacent units of the high-frequency antenna caused by the low-frequency antenna under the condition of large-angle scanning, so that phase mutation of horizontal components of re-radiated electromagnetic waves is eliminated, and the wide-band of the antenna for large-angle scanning is realized.
Fig. 2 is a three-view diagram of a circular polarization phased array antenna loaded with independent inductive matching junctions in an embodiment of the present invention, in which the high-frequency brick type circular polarization linear array and the low-frequency brick type circular polarization linear arrayThe circular polarization linear arrays are provided with 8 high-frequency brick type circular polarization linear arrays 101 and 8 low-frequency brick type circular polarization linear arrays 102 which alternately and repeatedly appear along the x direction, the distance between every two circular polarization linear arrays is d=2.5mm, each low-frequency brick type circular polarization linear array 102 is composed of 8 radiation units, the 8 radiation units are periodically and repeatedly arranged along the y direction, and the distance between every two radiation units is p 1 =7.5 mm. Each high-frequency brick type circularly polarized linear array 101 is composed of 12 radiating units, 12 radiating units are periodically repeated along the y direction, and the interval between every two radiating units is p 2 =5 mm. The independent inductive matching junctions 104 are positioned in each radiating unit in the high-frequency brick type circular polarization linear array 101 and the low-frequency brick type circular polarization linear array 102, each radiating unit internally comprises one or more pairs of independent inductive matching junctions 104, the width of each independent inductive matching junction 104 in the low-frequency brick type circular polarization linear array 102 is 3.1mm, and the width of each independent inductive matching junction 104 in the high-frequency brick type circular polarization linear array 101 is 4.7mm. The air column gaps 105 are positioned at two sides of each radiating unit of the high-frequency brick type circular polarization linear array 101, the diameter of the air column is 0.3mm, and the total length of the air column gaps 105 is 4.1mm. The metal floor 106 is located between and attached to the high-frequency brick type circular polarization linear array 101 and the low-frequency brick type circular polarization linear array 102, and the thickness of the metal floor 105 is 5mm.
Fig. 3 and fig. 4 show the influence of the presence or absence of the independent inductive matching junction 104 on the antenna impedance matching and the radiation performance, the antenna impedance bandwidth after loading the inductive matching junction is improved by 52%, and the radiation performance of the antenna is not affected.
Fig. 5 shows the suppression of the surface wave by the air column gap 105, wherein the air column gap 105 suppresses the abrupt horizontal polarization caused by the surface wave between the high-frequency antenna units during the high-angle scanning of the low-frequency antenna, and realizes the wide bandwidth of the high-angle scanning of the common-caliber circularly polarized antenna.
Table 1 antenna performance of the present invention
Through the design, the invention solves the problems of multiple variable multi-objective optimization problems faced by the prior common-caliber circular polarization brick type phased array when the caliber fusion design is carried out and the problem that the common-caliber circular polarization antenna is difficult to maintain the axial ratio bandwidth when scanning at a large angle, and has simple implementation mode. 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 (7)
1. The circular polarization phased array antenna loaded with the independent inductive matching junctions is characterized by comprising a high-frequency brick type circular polarization linear array (101), a low-frequency brick type circular polarization linear array (102), a strip line filter (103), the independent inductive matching junctions (104), an air column gap (105) and a metal floor (106), wherein the high-frequency brick type circular polarization linear array (101) and the low-frequency brick type circular polarization linear array (102) are respectively and periodically alternately and repeatedly arranged at the two sides of the metal floor (106) along the x direction, independent inductive matching junctions (104) are respectively arranged below the radiating bodies of the high-frequency brick type circular polarization linear array (101) and the low-frequency brick type circular polarization linear array (102), the air column gap (105) is arranged at the two sides of the radiating units of the high-frequency brick type circular polarization linear array (101), and the strip line filter (103) is arranged at the feeding structure of the low-frequency brick type circular polarization linear array (102);
the independent inductive matching junction (104) realizes independent regulation and control of antenna radiation performance and impedance matching by means of self-sealing characteristics of the SIW structure;
wherein the air column gap (105) is used for introducing discontinuity in the medium substrate so as to inhibit surface waves between adjacent units under large-angle scanning;
wherein the strip line filter (103) is used for improving the isolation of the port and simultaneously is also used as a reflector when the high-frequency unit radiates;
the metal floor (106) is used as a reflector of the high-frequency brick type circular polarization linear array (101) and the low-frequency brick type circular polarization linear array (102).
2. The circularly polarized phased array antenna loaded with independent inductive matching junctions according to claim 1, wherein the high frequency brick-type circularly polarized linear array (101) and the low frequency brick-type circularly polarized linear array (102) are single frequency brick-type circularly polarized linear arrays.
3. The circularly polarized phased array antenna loaded with independent inductive matching junctions according to claim 1 or 2, wherein the high-frequency brick-type circularly polarized linear array (101) and the low-frequency brick-type circularly polarized linear array (102) are provided with 8, 16 circularly polarized brick-type linear arrays alternately repeat along the x direction, the distance between every two circular polarized brick-type linear arrays is d=2.5 mm, each high-frequency brick-type circularly polarized linear array (101) is composed of 8 radiating elements, the 8 radiating elements repeat periodically along the y direction, and the distance between every two radiating elements is p=7.5 mm; each low-frequency brick type circular polarization linear array (102) is composed of 12 radiating units, the 12 radiating units are periodically repeated along the y direction, and the interval between every two radiating units is p=5 mm.
4. A circularly polarized phased array antenna loaded with independent inductive matching junctions according to claim 3, characterized in that the independent inductive matching junctions (104) are located inside the high frequency brick-like circularly polarized linear array (101) and the low frequency brick-like circularly polarized linear array (102), and each radiating element is provided with one or more independent inductive matching junctions (104).
5. The circularly polarized phased array antenna loaded with independent inductive matching junctions according to claim 4, wherein the stripline filter (103) is located inside the low-frequency brick type circularly polarized linear array (102) and is provided with 3 stripline branches which are symmetrical in the vertical direction, the length of the middle branch is 3.4mm, the length of the upper branch and the lower branch is 2.5mm, and the pitch of the branches is 0.6mm.
6. A circularly polarized phased array antenna loaded with independent inductive matching junctions as claimed in claim 5, wherein the air column gap (105) is between the elements of the adjacent brick-type circularly polarized linear array (101) at high frequency, the air column aperture diameter is 0.3mm and the pitch is 0.5mm.
7. The circularly polarized phased array antenna of claim 6 wherein the metal floor (106) is in alternating arrangement with and direct contact with the high frequency tile-type circularly polarized linear array (101) and the low frequency tile-type circularly polarized linear array (102) along the x-direction, and the metal floor (106) has a thickness of 5mm.
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| US7456789B1 (en) * | 2005-04-08 | 2008-11-25 | Raytheon Company | Integrated subarray structure |
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2023
- 2023-09-25 CN CN202311236497.2A patent/CN117239441A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7456789B1 (en) * | 2005-04-08 | 2008-11-25 | Raytheon Company | Integrated subarray structure |
| CN114156659A (en) * | 2021-11-30 | 2022-03-08 | 杭州电子科技大学 | Broadband common-caliber dipole array of Sub-6GHz and millimeter wave frequency bands |
| CN114552217A (en) * | 2022-04-07 | 2022-05-27 | 中国电子科技集团公司第三十八研究所 | Multi-band multiplexing sub-array module and radar antenna array surface |
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| Title |
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| RUI SEN HAO ET AL.: ""K-/Ka-Band Shared-Aperture Phased Array With Wide Bandwidth and Wide Beam Coverage for LEO Satellite Communication"", 《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》, 18 November 2022 (2022-11-18), pages 1 - 11 * |
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