A Compound Feed Parabolic Cylindrical Antenna and Detection Satellite

Abstract

The invention discloses a composite feed source parabolic cylindrical antenna and a detection satellite. The composite feed source parabolic cylindrical antenna includes: an offset parabolic cylindrical antenna, a composite feed source array, a parabolic cylindrical support, and a parabolic cylindrical support. To support the offset parabolic antenna, the composite feed array includes a phased array feed, a sparse feed array and a feed mounting plate, and the phased array feed and the sparse feed array are arranged on the feed mounting plate; wherein, The phase center of each feed in the sparse feed array is set on the focal line of the offset parabolic antenna, the array direction of the phased array feed is parallel to the focal line and set off-focus, the feed port of the phased array feed The face is flush with the face of the feed port of the sparse feed array. The invention adopts a double-row feed source array and shares a parabolic cylinder antenna, which can form a one-dimensional scannable high-gain narrow beam and multiple elliptical beams with consistent directions and similar shapes, and realizes the integrated design of the antenna, which is light in weight, The technical characteristics of low cost and high detection accuracy.

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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