一种基于介质填充的天线罩电厚度反射测试波导探头  

A Dielectric Filling Based Waveguide Probe for Reflection Measurement of Electrical Thickness of the Radome

作　　者：郭利强[1] 王克先 柴永伟 宗浩 GUO Li-qiang;WANG Ke-xian;CHAI Yong-wei;ZONG Hao(The 41st Research Institute of CETC,Qingdao 266555,China;The Aeronautical Science Key Lab for High Performance Electromagnetic Windows,The Research Institute for Special Structures of Aeronautical Composite AVIC,Ji'nan 250023,China)

机构地区：[1]中国电子科技集团公司第四十一研究所,青岛266555 [2]航空工业济南特种结构研究所高性能电磁窗航空科技重点实验室,济南250023

出　　处：《微波学报》2021年第1期1-6,共6页Journal of Microwaves

基　　金：国防技术基础科研项目(JSZL2018205C005)。

摘　　要：电厚度是雷达天线罩重要的电性能参数,在天线罩制造过程中经常需要采用反射测量方法实现工艺控制,但测试能力严重受限于测试探头与被测天线罩的失配反射影响。在分析失配原理的基础上,提出了反射测试波导探头内部介质填充方法,通过结构不连续性和介质不连续性的分离,实现了失配反射信号的内部自然抵消。给出了明确的介质填充形状和结构参数设计方法,并通过数值仿真和实际测量,验证了设计的有效性。介质填充波导探头设计方法简单,直接扩展了传统测试方法适用范围,提升了天线罩可测试厚度,与微波反射计或相位差测量装置配合,可以直接构成便携式电厚度反射测试仪,对天线罩研制生产现场工艺控制和装备应用现场性能检验具有重要意义。The electrical thickness is an important parameter of the electrical performance of the radome.In the process of the radome manufacture,it is often necessary to apply the reflection measurement method to realize the process control.However,the measurement ability is significantly limited by the mismatch between the test probe and the radome under test.Based on the analysis to the principles of the mismatch,the internal medium filling method of the reflection test waveguide probe is proposed innovatively.Through the separation of structural discontinuity and medium discontinuity,the internal natural cancellation of the mismatch reflection signal is achieved.The design methods of the medium filling shape and the structure parameters are clearly given,and the effectiveness of the design is verified through numerical simulation and practical measurement.The design method of the dielectric-filled probe is simple,which expands the application scope of the traditional method and increases the valid test thickness of the radome.It can also be used to constitute the portable electrical thickness reflection measurement apparatus together with the microwave reflector or phase difference measuring device,which is of great significance to the on-site process control of the radome manufacture,as well as the on-site performance test of the equipment application.

关 键 词：天线罩 电厚度 反射系数 介质填充 波导探头 

分 类 号：TN820.81[电子电信—信息与通信工程]