Composite feed source parabolic cylinder antenna and detection satellite

Abstract

The invention discloses a composite feed source parabolic cylinder antenna and a detection satellite. Wherein the composite feed source parabolic cylinder antenna comprises a bias parabolic cylinder antenna, a composite feed source array and a parabolic cylinder supporting part; the parabolic cylinder supporting part is used for supporting the bias parabolic cylinder antenna, the composite feed source array comprises a phased array feed source, a sparse feed source array and a feed source mounting plate, and the phased array feed source and the sparse feed source array are arranged on the feedsource mounting plate; the phase center of each feed source in the sparse feed source array is arranged on a focal line of the offset parabolic cylinder antenna, the array direction of the phased array feed source is parallel to the focal line and is arranged in an offset-focus manner, and the feed source aperture surface of the phased array feed source is aligned with the feed source aperture surface of the sparse feed source array. By adopting the double-row feed source array and sharing the parabolic cylinder antenna, a one-dimensional scannable high-gain narrow wave beam and a plurality of elliptical wave beams which are consistent in direction and similar in shape can be formed, the integrated design of the antenna is realized, and the antenna has the technical characteristics of light weight, low cost and high detection precision.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a compound feed parabolic cylinder antenna and a detection satellite. Background technique [0002] In the field of microwave detector technology, active and passive remote sensing joint observation can downscale the passive microwave brightness temperature or the data obtained by inversion by active observation, which can realize high-resolution and high-precision microwave detection. One of the key technologies of observation. [0003] The active detection adopts the synthetic aperture radar system. In order to ensure a certain width in the distance direction, the antenna beam needs to cover a certain range with high gain. At the same time, considering the resolution requirements, the beam needs to be converged in the azimuth direction, and the antenna needs to generate a one-dimensional sweepable height. Gain narrow beam. Passive detection adopts one-dimensional synthetic a...

AI Technical Summary

Problems solved by technology

[0004] In order to meet the beam requirements of active and passive microwave detection at the same time, the existing technology independently designs matching antennas. The antennas designed by this method are highly targeted, but the total weight and volume of the antennas need to be calculated with two antennas, especially for large reflectors. Plane antenna, independent design of active and passive antenna requires more cost and weight resources

In addition, the use of an antenna for the active and passive will increase the uncertainty of the data fusion of the active and passive, which will affect the detection accuracy of the microwave detector.

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