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
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[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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