同轴连接器退化对无源互调影响的建模研究

Modeling Study on The Impact of Coaxial Connector Degradation on Passive Intermodulation

同轴连接器具有轻微的非线性效应,这种非线性效应会引起无源互调干扰。同轴连接器在使用过程中会逐渐退化,使无源互调干扰加重,影响通信系统的可靠性。文中设计并进行了加速退化试验来制备不同退化程度的同轴连接器,在加速退化试验前后,测试了连接器的无源互调性能,并提出了一个新的多项式模型来描述不同退化程度的连接器的无源互调性能,模型与实验结果吻合良好。为分析同轴连接器退化对其无源互调性能的影响提供了理论依据。

Coaxial connectors generally have slight nonlinear characteristics.The nonlinearity of connectors can cause passive intermodulation(PIM)interference.The connectors will continuously degrade during use,which will aggravate the PIM interference and affect the reliability of communication systems.In this paper,a series of accelerated degradation test is designed and carried out in order to produce coaxial connectors with various degrees of degradation.The PIM property of the connector is tested before and after the accelerated degradation test.A new polynomial model is proposed to describe the PIM property of connectors with various degrees of degradation.The model agrees well with the experimental results.This paper provides a theoretical basis for analyzing the impact of coaxial connector degradation on its PIM property.