| Citation: | SHI X D，LI R P，ZHAO H X，et al. Non-standard interface aviation RF cable test method based on TRL[J]. Journal of Beijing University of Aeronautics and Astronautics，2023，49（9）：2207-2217 （in Chinese） doi: 10.13700/j.bh.1001-5965.2021.0645
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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.
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