Compact range collimator based on plane wave synthesis technology and optimization method thereof

Abstract

The invention discloses a compact range collimator based on a plane wave synthesis technology and an optimization method thereof. The collimator is a plane wave comprehensive array antenna, based on the array near-field synthesis technology, the feed amplitude and the phase of each antenna unit in the plane wave comprehensive array antenna are controlled by adopting a particle swarm optimization algorithm to generate quasi-plane waves required by testing, and a dead zone is realized in a darkroom. The plane wave comprehensive array antenna adopts a rotational symmetry structure and is providedwith a parasitic unit and a decoupling structure; the plane wave comprehensive array antenna comprises an antenna array surface, the antenna array surface comprises a plurality of antenna units. According to the array near-field synthesis technology, plane wave synthesis is carried out by using a near-field directional diagram of each antenna unit in the plane wave synthesis array antenna, and array near-field synthesis is carried out by using the in-array near-field directional diagram considering the coupling effect between array elements. The collimator is advantaged in that the collimatoris high in convergence efficiency, good in optimization effect and high in design precision, and an ideal quiet zone is achieved in a large frequency band.

Description

technical field [0001] The present application relates to a collimator device in an antenna compact range test system, in particular to a compact range collimator device based on plane wave synthesis technology. Background technique [0002] In 4G (fourth generation mobile communication) or earlier mobile communication technologies, the base station antenna does not need to be tested for channel consistency calibration, and the radio frequency characteristics of the base station antenna are tested by using a cable connection method. [0003] The base station antenna of 5G (fifth generation mobile communication) introduces Massive MIMO (Massive Multiple Input Multiple Output, massive multiple input multiple output) technology. This base station antenna adopts an active phased array antenna system, AAU (Active Antenna Unit, active antenna module) is integrated with the array, and signal coverage is achieved through beamforming, and the number of antenna units is 64, 128, 256 o...

AI Technical Summary

Problems solved by technology

Although the calculation time is short, its disadvantage is that the coupling effect between array elements cannot be fully considered in the process of array synthesis, and the calculation convergence is poor.

The patent CN107918068 A filed by Rohde & Schwarz in Germany discloses an antenna array for generating and / or receiving plane waves at a certain distance, but does not elaborate on its optimization method

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