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The Passive Intermodulation Characteristic Modeling and Experimental Investigation of N-Type Connectors |
JinQiuyan1, GaoJinchun1, Xie Gang2, Wang Chen3, Jia Jun3 |
1. School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100876 China; 2. School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China; 3. China Telecommunication TechnologyLabs Beijing 100191 China |
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Abstract In this paper, three different types of nonlinear current-voltage mathematical models are presented and compared at first. High order series nonlinear model is developed accordingly. In order to analyze the effect of model parameters on the intermodulation harmonics, the model parameters are logically determined and the calculation method of these parameters is put forward. Due to the particular third-order harmonic power is chosen as an index of nonlinear magnitude,some quantitative analysis of characteristic of passive intermodulation (PIM)for N-type connectors have been summarized according to a series of experimental investigations. An accelerated test is designed to obtain degradation sample to study the effect of electrical contact surface degradation on passive intermodulation. Finally, by comparing the outcome of experimental tests with the different theoretical results, the developed higher order seriesI-V model is better than traditional models in the prediction performance and the average error percentage can be controlled within 1.02%, as a result of which we can predict the value accurately. At the same time, in the simulation of high order harmonics analysis, each model shows a large difference, but through the method of parameter correction, the higher order harmonic prediction can be analyzedby the developednonlinear mathematical model.
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Received: 11 July 2016
Published: 22 December 2017
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