一种宽带大孔径相控阵波控优化设计

A Beam Control Optimization Design of Wide-band Phased Array with Large Aperture

针对用于电子对抗系统的大孔径相控阵列天线在瞬时带宽和实施成本间的矛盾,提出了一种波束控制网络优化设计。该设计在现有子阵级模拟延迟波控网络的基础上,采用剩余法和虚位技术,通过末端的小步进移相器波束控制器件,补偿前一级时延器件步进量引入的相位跳变,同时将时延网络分级处理,采用前级小步进时延器件补偿后级大步进时延器件的相位跳变,拟合形成与理论移相需求高吻合度的相位分布。在波束大角度扫描时兼有高指向精度、大瞬时带宽、低损耗、低成本等优点。

Aiming at the contradiction between instantaneous bandwidth and implementation cost of large aperture phased array antenna used in electronic countermeasures system,an optimal design of beam control network is proposed.Based on the existing sub-array level simulation delay beam control network,the residual method and virtual bit technology are used to compensate the phase jump introduced by the step of the previous stage delay device through the small step shifter beam control device at the end.Meanwhile,the delay network is processed hierarchical,and the phase jump of next large step delay device is compensated by forward small step delay device.The fitting forms a phase distribution that is highly consistent with the theoretical phase-shifting requirements.It has the advantages of high pointing accuracy,large instantaneous bandwidth,low loss and low cost when the beam is scanned at large angle.