CN113991296A - Dual-frequency common-caliber VICTS phased array antenna - Google Patents
Dual-frequency common-caliber VICTS phased array antenna Download PDFInfo
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Abstract
The invention discloses a dual-frequency common-aperture VICTS phased-array antenna, which comprises a radiation layer, a parallel plate waveguide layer and a feed network layer, wherein the radiation layer, the parallel plate waveguide layer and the feed network layer are sequentially arranged from top to bottom; the method has the advantages that the method can simultaneously cover two frequency bands of the mobile satellite communication system, and can reduce the area, the cost and the power consumption of the mobile satellite communication system when being used for the mobile satellite communication system.
Description
Technical Field
The invention relates to a VICTS phased array antenna, in particular to a dual-frequency common-caliber VICTS phased array antenna.
Background
Cts (continuos transform stub) array antennas were first introduced by Raytheon corporation in the 90 s of the 20 th century, and a large number of antennas of planar structures were developed. As a further development of CTS antenna arrays, the victs (variable initialization connecting transmit stub) technology is a two-dimensional beam scanning array that has a low profile, low power consumption, and strong mechanical robustness, while inheriting the original high efficiency.
The existing VICTS phased-array antenna mainly comprises an upper radiation CTS disc and a lower feed network disc, electric wave transmission among layers is an air medium conduction mode, impedance loss is reduced to the minimum degree, and therefore radiation efficiency is greatly improved. The two disks of the CTS disk and the lower feed network disk are radiated in a horizontal plane at unequal speed to generate phase gradient, and two-dimensional beam scanning capability can be obtained without using a phase shifter by utilizing the phase gradient, so that the beam direction of the VICTS phased array antenna is consistent with that of a satellite. When two frequency band mobile satellite communication systems are involved, a pair of VICTS phased array antennas is typically required for the uplink and downlink, respectively. The area required by a pair of separate VICTS phased array antennas would be doubled, however, to the detriment of the compactness of a mobile satellite communications system. Moreover, the number of required servo motors is doubled, which undoubtedly increases the cost and power consumption of the mobile satellite communication system.
Disclosure of Invention
The invention aims to provide a dual-frequency common-caliber VICTS phased-array antenna which can simultaneously cover two frequency bands of a mobile satellite communication system and can reduce the area, the cost and the power consumption of the mobile satellite communication system when being used for the mobile satellite communication system.
The technical scheme adopted by the invention for solving the technical problems is as follows: a dual-frequency common-aperture VICTS phased-array antenna comprises a radiation layer, a parallel plate waveguide layer and a feed network layer which are sequentially arranged from top to bottom, wherein the feed network layer is used for accessing external TE mode electromagnetic waves and converting the accessed TE mode electromagnetic waves into TEM mode electromagnetic waves to be output to the parallel plate waveguide layer, the parallel plate waveguide layer is used for transmitting the TEM mode electromagnetic waves input into the parallel plate waveguide layer to the radiation layer in an air medium conduction mode, and the radiation layer is used for transmitting the TEM mode electromagnetic waves transmitted to the radiation layer to a free space; the radiation layer comprises a first circular metal plate and a radiation unit arranged on the first circular metal plate, the radiation unit comprises two different types of CTS radiation branch groups, the two different types of CTS radiation branch groups are respectively called a first CTS radiation branch group and a second CTS radiation branch group, the first CTS radiation branch group comprises n first CTS radiation branches which are uniformly distributed at intervals from front to back, the second CTS radiation branch group comprises n second CTS radiation branches which are uniformly distributed at intervals from front to back, n is an integer which is more than or equal to 2, the center distance between two adjacent first CTS radiation branches is located in the range of 0.5 wavelength to 1 wavelength of a low frequency band, each first CTS radiation branch comprises two-stage first transition sections formed by stacking two first transition sections from bottom to top and a first rectangular matching block arranged at the lower left corner of the two-stage first transition sections, each second CTS radiation branch respectively comprises two stages of second transition branches formed by laminating two second transition branches from bottom to top, a second rectangular matching block arranged at the lower left corner of the two stages of second transition branches and a choke branch arranged at the center of the lower second transition branch in the two stages of second transition branches, wherein the length of the choke branch is in the range of 1/4-3/4 wavelength of a low frequency band; the n first CTS radiation branches and the n second CTS radiation branches are arranged in a crossed mode, the center distances between any two adjacent first CTS radiation branches and any two adjacent second CTS radiation branches are equal, and the center distances are located in the range of 0.5-1 wavelength of the high frequency band; when the parallel plate waveguide layer transmits high-frequency TEM mode electromagnetic waves to the radiation layer, the n first CTS radiation branches and the n second CTS radiation branches can radiate the high-frequency TEM mode electromagnetic waves to a free space; when the parallel plate waveguide layer transmits low-frequency TEM mode electromagnetic waves to the radiation layer, the n first CTS radiation branches can radiate the low-frequency TEM mode electromagnetic waves to a free space, the n second CTS radiation branches can restrain the low-frequency TEM mode electromagnetic waves, and the low-frequency TEM mode electromagnetic waves cannot radiate to the free space through the n second CTS radiation branches; the parallel plate waveguide layer comprises a second circular metal plate and a first parallel plate waveguide arranged on the second circular metal plate, the height of the first parallel plate waveguide is located in the wavelength range of 1/4-1/2 at a low frequency band, a parallel plate slow wave structure is arranged on the lower surface of the first parallel plate waveguide, when the parallel plate waveguide layer transmits high-frequency TEM mode electromagnetic waves, the parallel plate slow wave structure is used for reducing the wavelength of the high-frequency TEM mode electromagnetic waves and increasing the phase difference of the high-frequency TEM mode electromagnetic waves transmitted to the first CTS radiation branch and the second CTS radiation branch, when the parallel plate waveguide layer transmits the low-frequency TEM mode electromagnetic waves, the parallel plate slow wave structure is used for reducing the wavelength of the low-frequency TEM mode electromagnetic waves, and comprises m identical rectangular blocks, m is an integer more than or equal to 1, m identical rectangular blocks are arranged at equal intervals to form a comb shape, the first parallel plate waveguide and the parallel plate slow wave structure are both in a bilateral symmetry structure, and bilateral symmetry planes of the first parallel plate waveguide and the parallel plate slow wave structure are the same plane; the feed network layer comprises a third circular metal plate and a feed network structure arranged on the third circular metal plate, the feed network structure comprises a first line source and a second line source, the first line source is used for accessing high-frequency TE mode electromagnetic waves and converting the accessed high-frequency TE mode electromagnetic waves into high-frequency TEM mode electromagnetic waves and outputting the high-frequency TEM mode electromagnetic waves to the parallel plate waveguide layer so as to excite the parallel plate waveguide, and the second line source is used for accessing low-frequency TE mode electromagnetic waves and converting the accessed low-frequency TE mode electromagnetic waves into low-frequency TEM mode electromagnetic waves and outputting the low-frequency TEM mode electromagnetic waves to the parallel plate waveguide layer so as to excite the parallel plate waveguide layer; the beam scanning device comprises a first circular metal plate, a second circular metal plate and a third circular metal plate which are coaxially arranged, wherein the first circular metal plate is installed on the second circular metal plate in a rotatable mode, the second circular metal plate is fixedly connected with the third circular metal plate, and a gap of 1 mm exists between the second circular metal plate and the first circular metal plate to ensure that the first circular metal plate and the second circular metal plate can smoothly rotate relatively to complete two-dimensional beam scanning of an azimuth plane and a pitching plane.
The first line source is formed by cascading a five-stage equal-division rectangular waveguide power divider which divides 1 into 32, 32 TE mode electromagnetic wave-to-TEM mode electromagnetic wave adapters and a second parallel plate waveguide, and the second line source is formed by cascading a five-stage unequal-division rectangular waveguide power divider which divides 1 into 20, 20 TE mode electromagnetic wave-to-TEM mode electromagnetic wave adapters and a third parallel plate waveguide.
Compared with the prior art, the dual-frequency common-aperture VICTS phased-array antenna has the advantages that the dual-frequency common-aperture VICTS phased-array antenna is formed by the radiation layer, the parallel plate waveguide layer and the feed network layer, the feed network layer is used for accessing external TE mode electromagnetic waves and converting the accessed TE mode electromagnetic waves into TEM mode electromagnetic waves to be output to the parallel plate waveguide layer, the parallel plate waveguide layer is used for transmitting the TEM mode electromagnetic waves input into the parallel plate waveguide layer to the radiation layer in an air medium conduction mode, and the radiation layer is used for transmitting the TEM mode electromagnetic waves transmitted to the radiation layer to a free space; the radiation layer comprises a first circular metal plate and a radiation unit arranged on the first circular metal plate, the radiation unit comprises two different types of CTS radiation branch knot groups, the two different types of CTS radiation branch knot groups are respectively called a first CTS radiation branch knot group and a second CTS radiation branch knot group, the first CTS radiation branch knot group comprises n first CTS radiation branch knots which are uniformly distributed at intervals from front to back, the second CTS radiation branch knot group comprises n second CTS radiation branch knots which are uniformly distributed at intervals from front to back, n is an integer larger than or equal to 2, the center distance between every two adjacent first CTS radiation branch knots is positioned in the range of 0.5 wavelength to 1 wavelength of a low frequency band, each first radiation CTS branch knot comprises two-stage first transition branch knots formed by laminating two first transition branch knots from bottom to top and a first rectangular matching block arranged at the lower left corner of the two-stage first transition branch knots, each second CTS radiation branch comprises two stages of second transition branches formed by stacking two second transition branches from bottom to top, a second rectangular matching block arranged at the lower left corner of the two stages of second transition branches and a choke branch arranged at the center of the lower second transition branch in the two stages of second transition branches, wherein the length of the choke branch is within the range of 1/4-3/4 of a low frequency band; the n first CTS radiation branches and the n second CTS radiation branches are arranged in a crossed mode, the center distances between any two adjacent first CTS radiation branches and any two adjacent second CTS radiation branches are equal, and the center distances are located in the range of 0.5-1 wavelength of the high frequency band; when the parallel plate waveguide layer transmits high-frequency TEM mode electromagnetic waves to the radiation layer, the n first CTS radiation branches and the n second CTS radiation branches can radiate the high-frequency TEM mode electromagnetic waves to a free space; when the parallel plate waveguide layer transmits low-frequency TEM mode electromagnetic waves to the radiation layer, the n first CTS radiation branches can radiate the low-frequency TEM mode electromagnetic waves to a free space, the n second CTS radiation branches can restrain the low-frequency TEM mode electromagnetic waves, and the low-frequency TEM mode electromagnetic waves cannot radiate to the free space through the n second CTS radiation branches; the parallel plate waveguide layer comprises a second circular metal plate and a first parallel plate waveguide arranged on the second circular metal plate, the height of the first parallel plate waveguide is located in the range of 1/4-1/2 wavelengths of a low frequency band, a parallel plate slow wave structure is arranged on the lower surface of the first parallel plate waveguide, when the parallel plate waveguide layer transmits a high-frequency TEM mode electromagnetic wave, the parallel plate slow wave structure is used for reducing the wavelength of the high-frequency TEM mode electromagnetic wave and increasing the phase difference of the high-frequency TEM mode electromagnetic wave transmitted to the first CTS radiation branch and the second CTS radiation branch, when the parallel plate waveguide layer transmits the low-frequency TEM mode electromagnetic wave, the parallel plate slow wave structure is used for reducing the wavelength of the low-frequency TEM mode electromagnetic wave, the parallel plate slow wave structure comprises m identical rectangular blocks, m is an integer larger than or equal to 1, the m identical rectangular blocks are arranged at equal intervals to form a comb shape, the first parallel plate waveguide and the parallel plate slow wave structure are both in a bilateral symmetry structure, and the bilateral symmetry plane of the first parallel plate waveguide and the bilateral symmetry plane of the parallel plate slow wave structure are the same plane; the feed network layer comprises a third circular metal plate and a feed network structure arranged on the third circular metal plate, the feed network structure comprises a first line source and a second line source, the first line source is used for accessing high-frequency TE mode electromagnetic waves and converting the accessed high-frequency TE mode electromagnetic waves into high-frequency TEM mode electromagnetic waves and outputting the high-frequency TEM mode electromagnetic waves to the parallel plate waveguide layer so as to excite the parallel plate waveguide, and the second line source is used for accessing low-frequency TE mode electromagnetic waves and converting the accessed low-frequency TE mode electromagnetic waves into low-frequency TEM mode electromagnetic waves and outputting the low-frequency TEM mode electromagnetic waves to the parallel plate waveguide layer so as to excite the parallel plate waveguide layer; the two-dimensional wave beam scanning device comprises a first circular metal plate, a second circular metal plate and a third circular metal plate which are coaxially arranged, wherein the first circular metal plate is rotatably arranged on the second circular metal plate, the second circular metal plate is fixedly connected with the third circular metal plate, and a gap of 1 mm is formed between the second circular metal plate and the first circular metal plate so as to ensure that the first circular metal plate and the second circular metal plate can smoothly rotate relatively and complete two-dimensional wave beam scanning of an azimuth plane and a pitching plane; the invention realizes the output of high-frequency TEM mode electromagnetic waves and low-frequency TEM mode electromagnetic waves through the first CTS radiation branches and the second CTS radiation branches which are periodically distributed, and the first CTS radiation branches and the second CTS radiation branches can influence the phase of the high-frequency and low-frequency TEM mode electromagnetic waves in a parallel plate waveguide layer according to specific equidistant periodic distribution, thereby balancing the initial angle, the grating lobe and the bandwidth, reducing the distance between the adjacent first CTS radiation branches and the second CTS radiation branches while controlling the deviation of the initial angles of the high-frequency and low-frequency frequencies as much as possible, realizing the increase of the scanning angle, realizing the +/-45-degree angle scanning in both the high-frequency and low-frequency bands, ensuring the high-frequency and low-frequency bands, and the relative balance of the energies of the adjacent first CTS radiation branches, the adjacent second CTS radiation branches and the adjacent two first CTS radiation branches, the sawtooth-shaped parallel plate slow wave structure loaded below the first parallel plate waveguide can reduce the wavelength of high-frequency TEM mode electromagnetic waves when the parallel plate waveguide layer transmits the high-frequency TEM mode electromagnetic waves, increase the phase difference of the high-frequency TEM mode electromagnetic waves transmitted to the first CTS radiation branch and the second CTS radiation branch, and reduce the wavelength of the low-frequency TEM mode electromagnetic waves when the parallel plate waveguide layer transmits the low-frequency TEM mode electromagnetic waves.
Drawings
Fig. 1 is a burst diagram of a dual-band common-aperture VICTS phased array antenna of the present invention;
fig. 2 is a top view of the radiating layer of a dual-band common-aperture VICTS phased array antenna of the present invention;
FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;
FIG. 4 is a top view of a parallel plate waveguide layer of a dual-band common-aperture VICTS phased array antenna of the present invention;
fig. 5 is a top view of a feed network layer of a dual-band common-aperture VICTS phased array antenna of the present invention;
FIG. 6 is a high-frequency rotating beam-steering normalized directional diagram of a dual-frequency common-aperture VICTS phased-array antenna according to the present invention;
fig. 7 is a low-frequency rotating beam pointing normalized directional diagram of a dual-frequency common-aperture VICTS phased array antenna according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
Example (b): as shown in fig. 1-5, a dual-frequency common-aperture VICTS phased-array antenna includes a radiation layer 1, a parallel plate waveguide layer 2 and a feed network layer 3, which are sequentially arranged from top to bottom, the feed network layer 3 is used for accessing external TE mode electromagnetic waves and converting the accessed TE mode electromagnetic waves into TEM mode electromagnetic waves and outputting the TEM mode electromagnetic waves to the parallel plate waveguide layer 2, the parallel plate waveguide layer 2 is used for transmitting the TEM mode electromagnetic waves input into the feed network layer to the radiation layer 1 in an air medium conduction manner, and the radiation layer 1 is used for transmitting the TEM mode electromagnetic waves transmitted thereto to a free space;
the radiation layer 1 comprises a first circular metal plate 4 and a radiation unit 5 arranged on the first circular metal plate 4, the radiation unit 5 comprises two different types of CTS radiation branch group, the two different types of CTS radiation branch groups are respectively called a first CTS radiation branch group and a second CTS radiation branch group, the first CTS radiation branch group comprises n first CTS radiation branches 6 which are uniformly distributed at intervals from front to back, the second CTS radiation branch group comprises n second CTS radiation branches 7 which are uniformly distributed at intervals from front to back, n is an integer larger than or equal to 2, the center distance between every two adjacent first CTS radiation branches 6 is located in the range of 0.5 wavelength to 1 wavelength of a low frequency band, each first CTS radiation branch 6 respectively comprises two stages of first transition branches formed by laminating two first transition branches 8 from bottom to top and a first transition branch matching block 9 arranged at the lower left corner of the two stages of first transition rectangles, each second CTS radiation branch 7 includes two stages of second transition branches formed by stacking two second transition branches 10 from bottom to top, a second rectangular matching block 11 disposed at the lower left corner of the two stages of second transition branches, and a choke branch 12 disposed at the center of the lower second transition branch 10 in the two stages of second transition branches, and the length of the choke branch 12 is within the range of 1/4-3/4 wavelength of the low frequency band; the n first CTS radiation branches 6 and the n second CTS radiation branches 7 are arranged in a crossed mode, the center distances between any two adjacent first CTS radiation branches 6 and any two adjacent second CTS radiation branches 7 are equal, and the center distances are located in the range of 0.5-1 wavelength of a high frequency band; when the parallel plate waveguide layer 2 transmits high-frequency TEM mode electromagnetic waves to the radiation layer 1, the n first CTS radiation branches 6 and the n second CTS radiation branches 7 can radiate the high-frequency TEM mode electromagnetic waves to a free space; when the parallel plate waveguide layer 2 transmits low-frequency TEM mode electromagnetic waves to the radiation layer 1, the n first CTS radiation branches 6 can radiate the low-frequency TEM mode electromagnetic waves to a free space, the n second CTS radiation branches 7 suppress the low-frequency TEM mode electromagnetic waves, and the low-frequency TEM mode electromagnetic waves cannot radiate to the free space through the n second CTS radiation branches 7;
the parallel plate waveguide layer 2 comprises a second circular metal plate 13 and a first parallel plate waveguide 14 arranged on the second circular metal plate 13, the height of the first parallel plate waveguide 14 is within the range of 1/4-1/2 wavelengths of a low frequency band, a parallel plate slow wave structure is arranged on the lower surface of the first parallel plate waveguide 14, when the parallel plate waveguide layer 2 transmits a high-frequency TEM mode electromagnetic wave, the parallel plate slow wave structure is used for reducing the wavelength of the high-frequency TEM mode electromagnetic wave and simultaneously increasing the phase difference of the high-frequency TEM mode electromagnetic wave transmitted to the first CTS radiation branch section 6 and the second CTS radiation branch section 7, when the parallel plate waveguide layer 2 transmits the low-frequency TEM mode electromagnetic wave, the parallel plate slow wave structure is used for reducing the wavelength of the low-frequency TEM mode electromagnetic wave, the slow wave structure comprises m identical rectangular blocks, m is an integer greater than or equal to 1, the m identical rectangular blocks are arranged at equal intervals to form a comb shape, the first parallel plate waveguide 14 and the parallel plate slow wave structure are both in a bilateral symmetry structure, and the bilateral symmetry plane of the first parallel plate waveguide 14 and the bilateral symmetry plane of the parallel plate slow wave structure are the same plane;
the feed network layer 3 comprises a third circular metal plate 15 and a feed network structure arranged on the third circular metal plate 15, the feed network structure comprises a first line source 16 and a second line source 17, the first line source 16 is used for accessing a high-frequency TE mode electromagnetic wave and converting the accessed high-frequency TE mode electromagnetic wave into a high-frequency TEM mode electromagnetic wave to be output to the parallel plate waveguide layer 2 so as to excite the parallel plate waveguide layer 2, and the second line source 17 is used for accessing a low-frequency TE mode electromagnetic wave and converting the accessed low-frequency TE mode electromagnetic wave into a low-frequency TEM mode electromagnetic wave to be output to the parallel plate waveguide layer 2 so as to excite the parallel plate waveguide layer 2;
first circular metal sheet 4, the coaxial setting of the circular metal sheet of second 13 and third circular metal sheet 15, first circular metal sheet 4 adopts rotatable mode to install on the circular metal sheet 13 of second, the circular metal sheet of second 13 and the circular metal sheet 15 fixed connection of third, there is 1 millimeter's clearance between the circular metal sheet of second 13 and the circular metal sheet of first 4, in order to guarantee that first circular metal sheet 4 and the circular metal sheet of second 13 can smoothly carry out relative rotation, accomplish the two-dimensional beam scanning of azimuth plane and every single move face.
In this embodiment, the first line source 16 is formed by cascade-connecting a 1-32-divided five-stage equal rectangular waveguide power divider 18, 32 TE mode electromagnetic wave to TEM mode electromagnetic wave converters 19, and a second parallel plate waveguide 20, and the second line source 17 is formed by cascade-connecting a 1-20-divided five-stage unequal rectangular waveguide power divider 21, 20 TE mode electromagnetic wave to TEM mode electromagnetic wave converters 22, and a third parallel plate waveguide 23.
The dual-frequency common-aperture VICTS phased-array antenna is simulated, wherein a high-frequency rotating beam direction normalization directional diagram of the dual-frequency common-aperture VICTS phased-array antenna is shown in figure 6, and a low-frequency rotating beam direction normalization directional diagram of the dual-frequency common-aperture VICTS phased-array antenna is shown in figure 7. In fig. 6, ro represents the rotation angle of the radiation layer, the abscissa represents the position of the main beam of the antenna, and the ordinate represents the gain level. As can be seen from fig. 6 and 7, when a high-frequency electromagnetic wave or a low-frequency electromagnetic wave is input, the radiation layer of the antenna is rotated, and the beam direction of the antenna is observed to change with the change of the rotation angle of the radiation layer, the main beam direction of the antenna changes with the rotation of the radiation layer, and when the radiation layer rotates by 30 °, the beam direction of the antenna can reach 45 degrees.
Claims (2)
1. The dual-frequency common-aperture VICTS phased-array antenna is characterized by comprising a radiation layer, a parallel plate waveguide layer and a feed network layer which are sequentially arranged from top to bottom, wherein the feed network layer is used for accessing external TE mode electromagnetic waves and converting the accessed TE mode electromagnetic waves into TEM mode electromagnetic waves and outputting the TEM mode electromagnetic waves to the parallel plate waveguide layer, the parallel plate waveguide layer is used for transmitting the TEM mode electromagnetic waves input into the parallel plate waveguide layer to the radiation layer in an air medium conduction mode, and the radiation layer is used for transmitting the TEM mode electromagnetic waves transmitted to the radiation layer to a free space;
the radiation layer comprises a first circular metal plate and a radiation unit arranged on the first circular metal plate, the radiation unit comprises two different types of CTS radiation branch groups, the two different types of CTS radiation branch groups are respectively called a first CTS radiation branch group and a second CTS radiation branch group, the first CTS radiation branch group comprises n first CTS radiation branches which are uniformly distributed at intervals from front to back, the second CTS radiation branch group comprises n second CTS radiation branches which are uniformly distributed at intervals from front to back, n is an integer which is more than or equal to 2, the center distance between two adjacent first CTS radiation branches is located in the range of 0.5 wavelength to 1 wavelength of a low frequency band, each first CTS radiation branch comprises two-stage first transition sections formed by stacking two first transition sections from bottom to top and a first rectangular matching block arranged at the lower left corner of the two-stage first transition sections, each second CTS radiation branch respectively comprises two stages of second transition branches formed by laminating two second transition branches from bottom to top, a second rectangular matching block arranged at the lower left corner of the two stages of second transition branches and a choke branch arranged at the center of the lower second transition branch in the two stages of second transition branches, wherein the length of the choke branch is in the range of 1/4-3/4 wavelength of a low frequency band; the n first CTS radiation branches and the n second CTS radiation branches are arranged in a crossed mode, the center distances between any two adjacent first CTS radiation branches and any two adjacent second CTS radiation branches are equal, and the center distances are located in the range of 0.5-1 wavelength of the high frequency band; when the parallel plate waveguide layer transmits high-frequency TEM mode electromagnetic waves to the radiation layer, the n first CTS radiation branches and the n second CTS radiation branches can radiate the high-frequency TEM mode electromagnetic waves to a free space; when the parallel plate waveguide layer transmits low-frequency TEM mode electromagnetic waves to the radiation layer, the n first CTS radiation branches can radiate the low-frequency TEM mode electromagnetic waves to a free space, the n second CTS radiation branches can restrain the low-frequency TEM mode electromagnetic waves, and the low-frequency TEM mode electromagnetic waves cannot radiate to the free space through the n second CTS radiation branches;
the parallel plate waveguide layer comprises a second circular metal plate and a first parallel plate waveguide arranged on the second circular metal plate, the height of the first parallel plate waveguide is located in the wavelength range of 1/4-1/2 at a low frequency band, a parallel plate slow wave structure is arranged on the lower surface of the first parallel plate waveguide, when the parallel plate waveguide layer transmits high-frequency TEM mode electromagnetic waves, the parallel plate slow wave structure is used for reducing the wavelength of the high-frequency TEM mode electromagnetic waves and increasing the phase difference of the high-frequency TEM mode electromagnetic waves transmitted to the first CTS radiation branch and the second CTS radiation branch, when the parallel plate waveguide layer transmits the low-frequency TEM mode electromagnetic waves, the parallel plate slow wave structure is used for reducing the wavelength of the low-frequency TEM mode electromagnetic waves, and comprises m identical rectangular blocks, m is an integer more than or equal to 1, m identical rectangular blocks are arranged at equal intervals to form a comb shape, the first parallel plate waveguide and the parallel plate slow wave structure are both in a bilateral symmetry structure, and bilateral symmetry planes of the first parallel plate waveguide and the parallel plate slow wave structure are the same plane;
the feed network layer comprises a third circular metal plate and a feed network structure arranged on the third circular metal plate, the feed network structure comprises a first line source and a second line source, the first line source is used for accessing high-frequency TE mode electromagnetic waves and converting the accessed high-frequency TE mode electromagnetic waves into high-frequency TEM mode electromagnetic waves and outputting the high-frequency TEM mode electromagnetic waves to the parallel plate waveguide layer so as to excite the parallel plate waveguide, and the second line source is used for accessing low-frequency TE mode electromagnetic waves and converting the accessed low-frequency TE mode electromagnetic waves into low-frequency TEM mode electromagnetic waves and outputting the low-frequency TEM mode electromagnetic waves to the parallel plate waveguide layer so as to excite the parallel plate waveguide layer;
the beam scanning device comprises a first circular metal plate, a second circular metal plate and a third circular metal plate which are coaxially arranged, wherein the first circular metal plate is installed on the second circular metal plate in a rotatable mode, the second circular metal plate is fixedly connected with the third circular metal plate, and a gap of 1 mm exists between the second circular metal plate and the first circular metal plate to ensure that the first circular metal plate and the second circular metal plate can smoothly rotate relatively to complete two-dimensional beam scanning of an azimuth plane and a pitching plane.
2. The dual-frequency common-aperture VICTS phased-array antenna according to claim 1, wherein the first line source is formed by cascading 1-32 five-stage equal-division rectangular waveguide power divider, 32 TE mode electromagnetic wave-to-TEM mode electromagnetic wave adapters and a second parallel plate waveguide, and the second line source is formed by cascading 1-20 five-stage equal-division rectangular waveguide power divider, 20 TE mode electromagnetic wave-to-TEM mode electromagnetic wave adapters and a third parallel plate waveguide.
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| CN115051144A (en) * | 2022-05-27 | 2022-09-13 | 宁波大学 | Double-frequency common-caliber beam scanning antenna with large scanning range |
| CN115101926A (en) * | 2022-08-29 | 2022-09-23 | 成都国恒空间技术工程股份有限公司 | Dual-frequency VICTS phased-array antenna with orthogonal structure |
| CN115117616A (en) * | 2022-08-25 | 2022-09-27 | 成都国恒空间技术工程股份有限公司 | VICTS antenna based on RGW structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115051144A (en) * | 2022-05-27 | 2022-09-13 | 宁波大学 | Double-frequency common-caliber beam scanning antenna with large scanning range |
| CN115051144B (en) * | 2022-05-27 | 2023-04-21 | 宁波大学 | Dual-frenquency common bore wave beam scanning antenna of big scanning scope |
| CN115117616A (en) * | 2022-08-25 | 2022-09-27 | 成都国恒空间技术工程股份有限公司 | VICTS antenna based on RGW structure |
| CN115117616B (en) * | 2022-08-25 | 2022-12-02 | 成都国恒空间技术工程股份有限公司 | VICTS antenna based on RGW structure |
| US11728575B1 (en) | 2022-08-25 | 2023-08-15 | Chengdu Guoheng Space Technology Engineering Co., Ltd. | VICTS antenna based on RGW structure |
| CN115101926A (en) * | 2022-08-29 | 2022-09-23 | 成都国恒空间技术工程股份有限公司 | Dual-frequency VICTS phased-array antenna with orthogonal structure |
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