Phase interferometer based on broadband dual-polarized antenna array and direction finding method thereof

Abstract

The invention relates to a phase interferometer based on a broadband dual-polarized antenna array and a direction finding method thereof. The phase interferometer based on a broadband dual-polarized antenna array is characterized in that the phase interferometer comprises three double-polarized ultra-broadband loudspeaker-equipped antenna units, a metal mounting base and a broadband microwave absorbing material, wherein the double-polarized ultra-broadband loudspeaker-equipped antenna has a metal structure; two polarized ports are orthogonally placed; coaxial bottom feeding is utilized; a slit has a continuous gradual change structure; the bottom of each antenna unit has a waveguide chamber structure, thereby realizing an impedance matching function; a gradual change structure is adopted on four metal arms at periphery of the chamber, thereby further realizing impedance matching and reducing voltage standing-wave ratio; and chamfering is performed on four ridges of the antenna, thereby reducing the voltage standing-wave ratio of two ports. The phase interferometer and the direction finding method thereof are suitable for spaceborne, airborne, missile-borne and other related radio direction finding systems and have a more comprehensive parameter measuring function and higher platform adaptability.

Description

[0001] Technical field: [0002] The present invention relates to the technical field of broadband dual-polarization antenna array sensor device and its direction finding, in particular to a phase interferometer based on broadband dual-polarization antenna array and its direction-finding method which can be used in radio systems such as radar and communication . [0003] Background technique: [0004] In electronic systems such as radio navigation, electronic reconnaissance, electronic tracking and electronic countermeasures, a very important task is to determine the position of the target. There are many methods and types of direction finding, which can be roughly divided into two categories according to the direction diagram of the antenna. One is to use a certain directionality of a simple vibrator or antenna array to find direction; the other is to use system functions to find direction, and there is no special requirement for the antenna pattern. The former can find out ...

AI Technical Summary

Problems solved by technology

Disadvantages are: narrow working bandwidth and low direction finding accuracy

The existing interferometer design method does not have a formula to give the analytical relationship between the antenna array parameters and the direction-finding performance indicators. The design process is carried out in an iterative manner of "selection-verification", and it is impossible to directly determine the antenna array parameters according to the requirements of the indicators.

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