射频平面阵列目标位置控制系统的研究

摘要

阵列式射频仿真技术开始用于论证大型设备在复杂电磁环境下的效能评估试验,常规单一试验中心的球面阵列已难以适应此类试验,迫切需要构造一种新型阵列系统来完成新的试验,为此提出采用射频平面阵列式目标位置控制方案.设计并制作了平面阵列结构,论述了目标位置控制系统的阵列馈电方案以及软件模块,重点阐述了精位控制算法和粗位控制原理.提出四元组合成方案实现精位控制,并推导了四元组合成位置的角闪烁方程.最后在微波暗室内测试了典型频段下该系统的辐射信号合成角位置精度,结果表明该阵列系统在X波段的角位置模拟精度可达1 mrad,能够用于大型设备的效能评估试验.%Radio frequency simulation technique based on antenna array has been considered to carry out the effectiveness evaluation test for large equipment under the complex electromagnetic environment.It is difficult to adapt this test for traditional spherical array system with single test center.So it is urgent to construct a new type of array system to complete the new experiment.Accordingly the target position control solution based on the radio frequency plane array is put forward.A plane array structure is designed and constructed.Then the array feeding system and software modules of the target position control system are discussed,while exact position control algorithm and rough position control principle are emphasiced.A four-element synthesis method has been proposed to complete the exact position control,and the angular glint equation for positions achieved by the four elements is derived.Furthermore,the synthetic angular position accuracy of radiation signal produced by the system is tested under the typical frequency band in the microwave anechoic chamber.The result shows that the angular position simulation accuracy of the plane array system under X band is up to 1 mrad,which can be used to the effectiveness evaluation for large equipment.