基于超宽带技术的相控阵天线单元移相量测试

A Method of Testing the Phase-shifting Steps of Phased-array Antenna Element Based on Ultra-wideband Technologies

针对不便于拆卸和分解的相控阵天线单元,设计了一种基于超宽带技术的相控阵天线单元移相量测试方法。将ps级的超宽带信号耦合馈电到天线单元上,通过采样接收输出信号来测试天线单元移相状态,利用时间窗技术对接收信号进行处理,使测试误差减少了一个量级。搭建了超宽带时域测试系统,对相控阵天线单元移相量进行了测试,测试误差在±0.5°,证明了该方法的有效性。

A method,based on ultra-wideband technologies,is designed to quickly measure the phase-shift-ing steps of phased-array antenna element which is inconvenient to demount.By coupling and feeding UWB signals in picoseconds to antenna elements,phase-shifting steps of antenna element can be tested ac-cording to sampling echo signals.The use of data processing algorithms,such as window function method, greatly improves the accuracy of the test.A time domain measurement system of UWB used for testing phase-shifting steps of some phased-array antenna element is set up.The simulation is good in agreement with practice,and demonstrates the feasibility of the method in engineering practice.