Experimental analysis of passive intermodulation at TNC coaxial connectors

In this paper, the generation of passive intermodulation at standard TNC coaxial connectors is investigated. A series of tests has been performed in order to analysis the intermodulation level under different temperature circumstances. The relationship between the intermodulation response of the connectors and the change of temperature and straining on the junctions has been studied. It has been found that the passive intermodulation of TNC coaxial connectors was very sensitive to the changes of temperature and straining. High intermodulation should be caused when warming up from the low temperature.