基于TRL的非标准接口机载射频线缆测试方法  

Non-standard interface aviation RF cable test method based on TRL

作　　者：石旭东 李瑞蒲 赵宏旭 张浩天 SHI Xudong;LI Ruipu;ZHAO Hongxu;ZHANG Haotian(College of Electronic Information and Automation,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学电子信息与自动化学院,天津300300

出　　处：《北京航空航天大学学报》2023年第9期2207-2217,共11页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金(51377161)。

摘　　要：机载射频(RF)线缆是传输信号的主要介质,其回波损耗等性能参数影响飞机通导系统的工作,目前存在多种非标准接口线缆,需采用精密的转接引线,但其对阻抗、传输损耗等参数要求较高,且易发生性能衰减,导致测试结果产生较大误差。因此,针对应用精密转接引线进行测试时存在的问题,提出了基于TRL的非标准接口机载射频线缆测试方法。利用级联传输参数矩阵的方法对转接引线与待测线缆进行建模;利用改进的TRL校准方法对转接引线的参数进行去嵌入获取待测线缆的散射参数,进而评估机载射频线缆的性能。应用所提方法进行机载射频线缆测试实验,结果表明:除个别谐振点外,回波损耗最大误差约为1 dB,传输损耗最大误差约为0.2 dB,验证了所提方法的可行性和有效性。Aircraft radio frequency(RF)cables are the main medium for transmitting signals.There are currently various non-standard interface cables,and in order to use standard interface instruments for performance testing,precise adapter leads are required.However,the precise adapter leads have high requirements on parameters such as impedance and transmission loss,and precise adapter cables are prone to performance degradation,resulting in large errors in test results.Therefore,this paper proposes a non-standard interface aircraft RF cable test method based on TRL for the problems that exist when applying precision adapter leads.Firstly,the cascade transmission parameter method is used to model the test leads and the cable under test,and then the improved TRL calibration method is used to de-embed the test leads to obtain the scattering parameters of the tested cable,so as to evaluate the performance of the aircraft RF cable.The technique was used to test aircraft RF cables,and the findings show that,with the exception of a few resonance spots,the maximum error in return loss is approximately 1 dB and the maximum error in transmission loss is approximately 0.2 dB.This validates the method’s viability and efficacy.

关 键 词：去嵌入 TRL校准 传输线理论 S参数 级联 

分 类 号：V260[航空宇航科学与技术—航空宇航制造工程] TM931[电气工程—电力电子与电力传动]