S-frequency-band monopulse self-tracking antenna system

Abstract

The invention discloses an S-frequency-band monopulse self-tracking antenna system which comprises an antenna and a feed source system. The feed source system comprises an antenna feed source and a beam forming network (12). The antenna feed source comprises five crossed vibrators (8) which are arranged in a rhombus distribution structure. One crossed vibrator (8) is a central vibrator unit arranged on the point of intersection of diagonal lines of the rhombus. The other four crossed vibrators (8) are outside vibrator units which are arranged on the four vertexes of the rhombus respectively. The five crossed vibrators (8) receive signals. The beam forming network (12) comprises a sum signal forming circuit and a difference signal forming circuit. The sum signal forming circuit is connected with the central vibrator unit. The difference signal forming circuit is connected with the outside vibrator units. According to the S-frequency-band monopulse self-tracking antenna system, the central vibrator unit receives a formed sum signal, the outside vibrator units receive formed difference signals, and therefore monopulse self-tracking is achieved.

Description

technical field [0001] The invention relates to the field of antenna systems, in particular to an S-band monopulse self-tracking antenna system. Background technique [0002] In order to realize the self-tracking of space flight targets by using single-channel monopulse tracking, the monopulse tracking antenna system is an important part of monopulse tracking radar, and the received signal is formed by the beamforming network and the difference signal. The performance of the monopulse antenna depends largely on the feed source of the antenna. [0003] The earliest monopulse tracking radar used the horn feed. It added the received signals of the four horns to form a sum signal. The difference between the left and right pairs of horns formed an azimuth difference signal, and the difference between the upper and lower pairs of horns formed a pitch difference signal. The sum and difference of the horn feed are contradictory, and the design and poor performance cannot be optimiz...

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Problems solved by technology

[0003] The earliest monopulse tracking radar used the horn feed. It added the received signals of four horns to form a sum signal. The difference between the left and right pairs of horns formed an azimuth difference signal, and the difference between the upper and lower pairs of horns formed a pitch difference signal. The sum and difference of the horn feed are contradictory, and the design time and poor performance cannot be optimized, so the design can only be compromised. In addition, the feeder network of the 4-speaker feed is relatively complicated, so there are multi-speaker feeds and multi-mode speakers. feed source

[0004] Another way to solve the contradiction between sum and difference is to use multi-mode horn feed, which has good performance and simple structure, but it is difficult to realize circular polarization processing, so it is only suitable for linear polarization tracking radar

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