A modified checkerboard structure array suitable for near-field plane wave simulator

Abstract

The invention discloses a modified checkerboard structure array suitable for a near-field plane wave simulator. The array is composed of a miniaturized dual-polarized probe antenna, a pyramid absorbing material, a radio frequency cable and an amplitude-phase control network. Among them, the dual-polarized probe antenna has a compact structure and is characterized by miniaturization, and the probe antenna itself has low scattering. The rear floor of the probe antenna is a pyramid absorbing material, and the pyramid absorbing material and the probe antenna form an array unit, thereby obtaining a low-scattering array unit. The positional relationship of the corrected checkerboard structure array unit on the Z axis is determined by the near-field phase distribution of the measured antenna incident on the plane wave simulator, and the corrected checkerboard structure array unit antenna feed correction compensation value is configured by the amplitude and phase control network, so that The scattering level of the modified checkerboard structure array is lower than that of the traditional checkerboard structure array under the incidence of non-plane waves, and the multiple reflections between the plane wave simulator and the antenna under test are effectively suppressed.

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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