基于反相法的中场校准技术研究  

Research on Middle Field Calibration Technology Based on Phase Inverted Method

作　　者：连迎春 于大群[1] LIAN Yingchun;YU Daqun(Nanjing Research Institute of Electronics Technology,Nanjing 210039,China)

机构地区：[1]南京电子技术研究所,南京210039

出　　处：《微波学报》2024年第1期73-78,共6页Journal of Microwaves

摘　　要：在相控阵天线研制中,阵面校准是非常重要的一环。对比各种校准方法,中场法使用设备少、测试效率高,因而获得了广泛的应用。通常情况下,阵面中的T/R组件内设计有三态开关(发射态、接收态、负载态),中场测试时,通过“逐路通”的方式(逐一选通T/R组件的射频通道,非被测通道处于负载状态),得到所有通道的发射通道(或接收通道)的幅相数据。但在“芯片化”T/R组件组成的阵面中,开关隔离度有限,泄露信号严重干扰被测信号,甚至无法进行正常的故障判断。本文讨论一种基于反相法的中场校准方法,分析了该方法的误差量级,最后通过远场波瓣测试验证了该方法的有效性。Array calibration is a key step in research on phased array antenna.Compared with other calibration methods,middle-field calibration uses fewer devices and has higher test efficiency,so it has a wide range of application.Usually,three-state switches(transmission-state,receiving-state and load-state)are designed and used in T/R modules.During middle-field test,data of amplitudes and phases in all transmission channels(receiving channels)may be obtained by“one by one”method(switch on receive channels of T/R modules one by one and the non-tested channels is in the load-state).However,isolation of switch is limited in the array composed of“chipping”T/R modules.So signals to be tested will be interfered by leakage signals severely,and faults cannot even be identified normally.In this article,a middle-field calibration based on inverse phase method is proposed and its error magnitude is analyzed.Finally,this method is verified valid by patterns tested in far-field.

关 键 词：中场法 相控阵天线 反相法 芯片化 校准 

分 类 号：TN820[电子电信—信息与通信工程]