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本文介绍一种用于研究大型平面发射阵波束扫描特性的集合式相移开关波束扫描发射系统.这种系统利用的是等距阵相移开关波束扫描原理.它特别适用于研究各种不同尺寸、不同形状的阵元所构成的线阵或平面阵,在大角度扫描时的远场和近场的精细结构.波束扫描指向角,可以通过改变工作频率或阵元间距,控制到任意所需的指向.在不增加通道的情况下,适用于任意多个阵元所构成的等矩阵,包括在周期结构上随机分布所形成的随机阵. 本系统主要由集合式相移开关扫描波束形成器,多路功率放大器和宽频带多档输出匹配变压器组组成. 为了检验整个系统的性能,进行了初步实验.在水池中用脉冲法测量了扫描波束的指向性图.扫描波瓣的峰值位置θ_0的实验值和理论值符合得较好.
This paper presents an integrated phase shift switch beam scanning transmission system for studying the characteristics of large planar emission array beam scanning. This system utilizes the isometric array phase shift switch beam scanning principle and is particularly suitable for studying various sizes , Different shapes of array elements formed by the line array or plane array, in the large-angle scanning of the far field and near the fine structure of the beam scanning point of view, you can change the operating frequency or array spacing, control to any desired , Which can be applied to the equi-matrix formed by any number of array elements without increasing the channel, including the stochastic matrix randomly distributed in the periodic structure.The system mainly consists of an integrated phase shift switch scanning beamformer , Multi-channel power amplifier and broadband multi-file output matching transformer group.In order to test the performance of the whole system, a preliminary experiment was carried out.In the pool, the directivity pattern of the scanning beam was measured by pulse method.The peak position of the scanning lobe θ_0 The experimental value is in good agreement with the theoretical value.