Correction chessboard structure array suitable for near-field plane wave simulator

Abstract

The invention discloses a correction chessboard structure array suitable for a near-field plane wave simulator. The array is composed of a miniaturized dual-polarized probe antenna, a pyramid wave-absorbing material, a radio frequency cable and an amplitude-phase control network. The dual-polarized probe antenna is compact in structure and has the characteristic of miniaturization, and the scattering of the probe antenna is relatively low. The probe antenna tail floor is the pyramid wave-absorbing material, and the pyramid wave-absorbing material and the probe antenna form an array unit, so that a low-scattering array unit is obtained. The position relation of the correction chessboard structure array unit on the Z axis is determined by the near-field phase distribution of the measured antenna incident to the aperture of the plane wave simulator. The antenna feed correction compensation value of the correction chessboard structure array unit is configured by the amplitude-phase controlnetwork, so that the scattering level of the correction chessboard structure array under non-planar wave incidence is lower than that of the traditional chessboard structure array, and multiple reflections between the planar wave simulator and the tested antenna are effectively inhibited.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a modified checkerboard structure array suitable for a near-field plane wave simulator. Multiple reflections between antennas. Background technique [0002] The plane wave simulator can use the far-field principle to directly measure the antenna at the near-field distance, without the need for near-far-field transformation post-processing of the test data. The basic principle is to synthesize a quasi-plane wave of a certain size at a relatively short near-field distance through an array and its amplitude and phase control network. The size of the quasi-plane wave can cover the aperture range of the antenna under test, and the waviness of the quasi-plane wave can meet Far-field test conditions for the antenna under test. [0003] Compared with traditional antenna test fields such as far field, compact field and near field, the plane wave simulator has relatively comprehensive a...

AI Technical Summary

Problems solved by technology

The checkerboard structure array is an effective scattering suppression method. The patent CN107591617 A applied by the University of Electronic Science and Technology of China mentions a SIW cavity-backed slot antenna loaded with a mixed AMC checkerboard structure. The array of the checkerboard structure effectively suppresses backscattering. But its checkerboard structure suppresses the far-field scattering value

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