Dual-polarized waveguide feed array antenna

Abstract

The invention discloses a dual-polarized waveguide feed array antenna which comprises horizontally polarized radiation waveguides arranged in an array along the horizontal direction; vertical polarization radiation waveguides which are arranged in an array in the vertical direction and are evenly inserted into the horizontal polarization radiation waveguides in an array mode; a compact sum-difference network, and a distributed sum-difference network, wherein upper surfaces of the horizontal polarization radiation waveguides and first ends of the vertical polarization radiation waveguides forma planar array; the compact sum-difference network is arranged above the central position of the planar array and is connected with the horizontally polarized radiation waveguides; and the distributedsum-difference network is arranged at the periphery of the compact sum-difference network, is connected with the vertical polarization radiation waveguides, and is positioned on the same layer as thecompact sum-difference network. The problems that an array antenna of a traditional waveguide feed network is large in thickness and low in isolation degree are solved, a feed structure of the compact sum-difference network and the distributed sum-difference network is adopted, two paths of sum-difference networks surrounding the center of the antenna are achieved, the high isolation degree and structural stability of the array antenna are achieved, and high practicability and good application prospects are guaranteed.

Description

technical field [0001] The invention relates to the technical field of waveguide antennas, in particular to an array antenna fed by a dual-polarized waveguide. Background technique [0002] With the improvement of the detection accuracy and anti-interference ability of radar seeker, the research of waveguide dual-polarization compound guidance has attracted more and more attention. Therefore, there are endless researches on the feeding of dual-polarized compound array antennas. The feeding network includes a power division network and a sum-difference network. Plane feed and design of sum and difference network. [0003] At present, the design of the feed network includes various combinations of slot radiators, microstrip transmission lines, and couplers. The common method is only to feed the radiating elements with a central feed connection hybrid joint for the radiating front. Large-scale dual-polarization waveguide arrays lack practicality. [0004] In recent years, va...

AI Technical Summary

Problems solved by technology

This structure aims to solve the problem of large thickness and low isolation of the array antenna of the traditional waveguide feeding network. It adopts the feeding structure of compact sum difference network and distributed sum difference network, and designs the coupling waveguides of two polarizations in the same At the level, realize the two-way sum and difference network around the center of the antenna, realize the high isolation and structural stability of the array antenna, and ensure high practicability and application prospects

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