N型连接器无源互调特征建模与实验研究  

The Passive Intermodulation Characteristic Modeling and Experimental Investigation of N-Type Connectors

作　　者：金秋延 高锦春[1] 谢刚[2] 王晨 贾骏 

机构地区：[1]北京邮电大学电子工程学院,北京100876 [2]北京邮电大学信息与通信工程学院,北京100876 [3]中国信息通信研究院泰尔实验室,北京100191

出　　处：《电工技术学报》2017年第23期227-234,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(61531007)

摘　　要：首先对比分析三种不同类型的非线性电流-电压数学模型特点,提出高阶幂级数非线性模型,设定参数并提出参数计算方法,用以分析模型参数对于各次互调谐波的影响。然后选取三阶互调功率值作为衡量N型连接器互调性能的指标,通过实验测试对N型连接器的互调特征进行量化分析。设计加速实验得到退化的测试样品,研究电接触表面退化对于无源互调的影响。最后,通过对比实验测试结果与理论模型的预测结果发现,该高阶幂级数模型在预测性能上优于传统模型,可以将预测误差降低到1.02%,能够进行精准的预测。同时,通过高次谐波的仿真分析发现,各模型预测差异较大,通过参数修改,高阶幂级数模型能进行高次谐波的预测分析。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 series I-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 analyzed by the developed nonlinear mathematical model.

关 键 词：电流-电压模型 无源互调 三次谐波 加速试验 电接触 

分 类 号：TM503.5[电气工程—电器]