Uniform circular array direction-finder antenna receiving mutual impedance test and mutual coupling compensation system

Abstract

The invention discloses a uniform circular array direction-finder antenna receiving mutual impedance test and a mutual coupling compensation system. A method for achieving the system comprises receiving a mutual impedance model building unit, obtaining an antenna port voltage unit under array element mutual coupling, obtaining an antenna port voltage unit under non-array-element mutual coupling, building a mutual coupling voltage array unit, building a mutual coupling current array unit and building a uniform circular array receiving mutual impedance array unit. The uniform circular array direction-finder antenna receiving mutual impedance test obtains all antenna port voltage under array element mutual coupling effects and antenna port voltage after removing the mutual coupling effects by setting one horizontal wave incoming direction, and a uniform circular array receiving mutual impedance array is built according to a receiving mutual impedance theory. When direction-finding equipment works, the uniform circular array receiving mutual impedance array conducts mutual coupling compensation on a direction-finder terminal processing machine while meeting work frequency points, and accordingly direction showing degree output by the direction-finding equipment is accurate.

Description

technical field [0001] The present invention relates to a method for testing the electromagnetic interference of a direction-finding antenna, more particularly, it refers to a method for testing the receiving mutual impedance of a uniform circular array direction-finding antenna in a direction-finding device, and testing the uniform A system for compensating the mutual coupling of circular array direction finding antennas. Background technique [0002] Radio direction finding is the process of using radio directional equipment to determine the direction of the working radio radiation source. It is an important content of electromagnetic spectrum management and an important basis for sorting and identifying radio signals. Array antennas, especially uniform circular array direction-finding antennas, have a wide range of applications in radio direction-finding, including amplitude ratio, phase ratio, correlation interferometer, and spatial spectrum estimation. and other inform...

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Problems solved by technology

In May 2004, Hon Tai Hui published "A Practical Approach to Compensate for the Mutual Coupling Effect in an Adaptive Dipole Array" in IEEETRANSACTIONS ON ANTENNAS AND PROPAGATION (Antenna and Propagation) Volume 52, Issue 5. Practical method of coupling influence)”, this paper proposes an array antenna mutual coupling compensation model based on the theory of receiving mutual impedance, which can realize accurate compensation of multi-element array antenna mutual coupling, but the receiving mutual impedance data of the array antenna needs to be known accurately

[0004] In 2010, H.S.Lui published "Improved mutual coupling compensation in compact antenna arrays (improved mutual coupling compensation of compact antenna array)" in IET Microw.Antennas Propag. Volume 4, which proposed an array antenna based on multi-angle testing Accurate transimpedance data method, the disadvantage of this method is that it is necessary to set the incoming wave in the horizontal direction from the number of array elements minus one direction, and it is necessary to accurately record the mutual coupling of each array element and the antenna port for removing mutual coupling in each incoming wave Voltage value, the test steps are cumbersome

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