Broadband dual-polarized antenna array device and high-resolution direction finding method

Abstract

The invention belongs to the technical field of electromagnetic fields and microwaves, and particularly relates to a broadband dual-polarized antenna array device and a high-resolution direction finding method used in a radar radio communication system. The system is characterized in that a six-unit ultra-wide-band back-cavity dual-polarized log-periodic antenna array is arranged to form a multi-baseline direction finding system of a twelve-port network, wherein each unit is of a dual-polarized structure and provides two polarization ports, each antenna unit forms a polarized orthogonal electromagnetic field in the main radiation direction, the ultra-wide-band back-cavity dual-polarized log-periodic antenna array is composed of a metal installation chassis, a broadband microwave absorption material and three ultra-wide-band back-cavity dual-polarized log-periodic antenna units, and an antenna cover is subconical. By means of the device and method, high-resolution estimation of radiation source signals in the two-dimensional arrival direction and polarization parameter joint measurement can be achieved at the same time.

Description

Technical field: [0001] The invention belongs to the field of electromagnetic field and microwave technology, and specifically relates to a broadband dual-polarization antenna array device and a high-resolution direction finding method that can be used in radio communication systems such as radar. Background technique: [0002] 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. Direction of arrival (DOA, Direction of Arrival) estimation, as an important research direction in the field of array signal processing, is widely used in many fields such as radar, communication, sonar, seismic, exploration, radio astronomy, and biomedical engineering. In the military, in the modern electronic warfare environment, signal sources are dense, complex, and changeable. There are often multiple radars (radiation sources) in the actual direction-findi...

AI Technical Summary

Problems solved by technology

[0003] Traditional radio direction-finding equipment generally adopts the form of a single-polarization antenna, which can only perceive and measure the single-polarization information of incident electromagnetic waves, and the current technical level is relatively mature, and the technical indicators in target detection, parameter measurement and tracking, etc. Relatively stable; in order to meet the technical requirements of the new generation of electronic reconnaissance and direction finding systems, radio direction finding equipment with more powerful multi-parameter function has become an important development trend in the field of direction finding

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