Satellite-borne fully-polarized broadband phased-array antenna
A broadband phased array, fully polarized technology, applied in the direction of antenna, antenna array, antenna grounding switch structure connection, etc., can solve the problem of narrow instantaneous bandwidth of antenna, unpublished design scheme of antenna, and no component data found, etc. Flexible selection, the effect of increasing instantaneous bandwidth
Pending Publication Date: 2021-11-16
CHINA ELECTRONICS TECH GRP CORP NO 14 RES INST
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Problems solved by technology
It can be seen from the working bandwidth that the instantaneous bandwidth of the above two antennas is relatively narrow, and no component information for delay compensation has been found.
At the same time, the detailed design schemes of the two foreign antennas have not been disclosed, so a detailed design of the spaceborne phased array antenna system is required
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[0034] combine Figure 1-Figure 5 , this embodiment discloses a space-borne fully polarized broadband phased array antenna, the antenna works in the L-band, and the antenna aperture size is 10×3m 2 (Dx×Dy), consisting of panel 1, panel 2, panel 3 and panel 4, the size of a single panel is 2.5×3m 2 . In the retracted state, the four panels of the antenna are respectively fixed on both sides of the load compartment. In the unfolded state, the four panels of the antenna form a two-dimensional planar phased array antenna. Each panel consists of several 1×4 (m×n) modules Composition, the entire antenna has 16 modules, and the aperture area of the module is 0.625×3m 2 , the electrical principle and external interface of each module are the same.
[0035]The antenna includes radio frequency transceiver component AB, scaler C, wave control extension D, distributor E, panel dual-polarization feed network AB, panel calibration network D, panel power supply network E, module dual-po...
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The invention relates to a satellite-borne fully-polarized broadband phased-array antenna. A panel dual-polarization feed network of the antenna is respectively connected with a module dual-polarization feed network and a radio frequency transceiving assembly, a panel calibration network is respectively connected with a module calibration network and a calibrator, a panel control network is respectively connected with a wave control unit and a wave control extension set, a panel power supply network is connected with the secondary power supply and the distributor; a time delay T / R assembly comprises an H polarization time delay T / R assembly and a V polarization time delay T / R assembly, the time delay T / R assembly is respectively connected with the module dual-polarization feed network, a dual-polarization radiation subarray, the module calibration network and a wave control unit, and the secondary power supply is connected with the wave control unit. According to the structure, flexible selection of antenna polarization can be achieved, the delay T / R assembly is additionally arranged, the instantaneous bandwidth of the antenna is increased, and the antenna can be applied to a spaceborne SAR satellite with the functions of height measurement, deformation measurement, reconnaissance and the like.
Description
technical field [0001] The invention relates to the technical field of microwaves and antennas, in particular to a space-borne fully polarized broadband phased array antenna. Background technique [0002] The spaceborne synthetic aperture radar (SAR) system can obtain high-precision digital elevation map (DEM), digital surface map (DSM) and high-resolution images of land in the world around the world, all-weather and all-weather, regardless of national boundaries. For spaceborne SAR systems, the function and performance of the phased array antenna system will directly affect the working mode and measurement accuracy of the SAR system. For example, the polarization of the antenna system determines the amount of target polarization information obtained by spaceborne SAR, and the antenna bandwidth It directly affects the SAR resolution. The higher the antenna polarization isolation, the higher the SAR measurement accuracy. At the same time, the antenna system is an important su...
Claims
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Login to View More IPC IPC(8): H01Q21/00H01Q1/36H01Q1/50
CPCH01Q21/00H01Q1/36H01Q1/50
Inventor 胡明春余伟孙红兵谢武涛李树良吴建军沈礼
Owner CHINA ELECTRONICS TECH GRP CORP NO 14 RES INST