高功率微波大口径相控阵天线拍波辐射方法研究

Research on High Power Microwave Beat-wave Radiation Method of Large Aperture Phased Array Antenna

相控阵天线是未来高功率微波辐射系统的重要形式之一,是当前研究的热点。为了获得超高等效全向辐射功率,高功率微波天线均为大口径形式。而大口径相控阵天线在辐射高功率微波拍波过程中,存在波束分裂、增益下降问题。针对该问题,本文提出了一种大口径相控阵天线拍波辐射结构,采用“子阵-面阵”两级馈电形式,解决了拍波辐射过程中波束分裂问题,有效提高了高功率微波系统的综合性能。该方法极大地节约了移相器数量,节省了系统成本,降低了系统复杂度,有利于实现高功率微波系统的小型化,提高系统的可靠性。

Phased array antenna is one of the important forms of high power microwave(HPM)radiation system in the future.In order to obtain ultra-high equivalent isotropic radiated power(EIRP),HPM antenna is large-aperture form.Large-aperture phased array antenna has the problem of beam splitting and gain decreasing in the process of radiating HPM beat-wave.To solve this problem,a large-aperture phased array antenna beat-wave radiation structure is proposed in this paper.The two-stage form of"sub-array and plane-array"is adopted to work out the problem of beam splitting in the process of beat-wave radiation and improve the comprehensive performance of HPM system effectively.This method can greatly save the number of phase shifters,save the system cost and reduce the system complexity.It is beneficial to realize the miniaturization of HPM system and enhance the system reliability.