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

A uniform circular array, direction finding antenna technology, applied in antenna coupling, measuring resistance/reactance/impedance, antenna and other directions, can solve the problem of cumbersome test steps, and achieve the effect of reducing volume and improving direction finding accuracy

Active Publication Date: 2013-03-27
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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

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Embodiment

[0109] The following is an example of a nine-element uniform circular array direction-finding antenna with a radius of 1 meter consisting of nine half-wave dipole omnidirectional antennas. The working frequency is 75MHz, and the matching impedance of each array element is 50Ω. The direction finding system of the direction finding machine adopts the spatial spectrum estimation system of the UCA-RB-MUSIC algorithm. Set two equal-power incoming wave signals to be incident in two directions, the incoming wave elevation angle is 90 degrees, the incoming wave horizontal angle is 30 degrees, and the incoming wave elevation angle is 90 degrees, and the incoming wave horizontal angle is 160 degrees. The simulation in Matlab 2009b software does not perform mutual coupling Compensation and the directional results using mutual coupling compensation are as follows Figure 4 shown. The estimated peak value of the spatial spectrum in the figure is the directionality of the incoming wave. I...

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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...

Claims

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Application Information

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IPC IPC(8): H01Q1/52H01Q21/00H01Q21/28G01R31/00G01R27/02
Inventor 谢树果杜威李圆圆苏东林刘亚奇武明川陈少刚叶知秋
Owner BEIHANG UNIV
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