Logarithmic Periodic Feed Array Based on Spaceborne Multi-beam Antenna Spatial Structure Layout

Abstract

The invention provides a log periodic feed source array based on spaceborne multi-beam antenna space three-dimensional structure layout. The log periodic feed source array is composed of five groups of high-frequency feed units, four groups of low-frequency feed units and a composite material supporting component. The mutual coupling influence on electrical performance of the feed source array between antennas can be reduced to the largest extent through three-dimensional structure layout and unit array distribution optimization under the requirement of spaceborne limited space layout so that the multi-beam coverage requirement of broadband and high gain of the antennas can be realized; the units and the supporting component are simple in structural form and high in reliability so that great rigidity-to-gravity requirement of the feed source array can be realized; and the special composite material and ingenious structural design are adopted, shielding influence of the supporting component on the electrical performance of the formed high-frequency and low-frequency feed units is enabled to be minimized under the condition of meeting the main structural strength of the feed source array, and the space environmental requirements can also be met.

Description

technical field [0001] The invention relates to the technical field of space-borne antennas, in particular to a logarithmic periodic feed array based on the spatial three-dimensional structural layout of space-borne multi-beam antennas. Background technique [0002] In order to adapt to the continuous increase of satellite communication capacity and the reduction of communication satellite user costs, communication satellite designers have taken various measures to meet these requirements. Multi-beam antenna is a technology that meets these requirements. The use of multi-beam antennas can achieve beam space and polarization isolation, and achieve multiple frequency reuse, thereby increasing the available bandwidth and greatly increasing the communication capacity; using multi-beams, it can also make a single beam cover a large area of ​​the earth. It only focuses on the coverage of a small area within a few beams, thereby increasing the radiation power flux density of the s...

AI Technical Summary

Problems solved by technology

In the past, the feed array array was arranged in a plane layout, and its structural size and occupied space were relatively large, which was not conducive to the design of space-borne antenna limited space layout.

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