Behavior Modeling of Cascading Passive Intermodulation in Coaxial Connectors with Nonlinear Transfer Function

被引：0

作者：

Jin, Qiuyan ^{[1
]}

Ji, Rui ^{[2
]}

Liu, Ruizhe ^{[1
]}

Wei, Liping ^{[1
]}

机构：

[1] Southwest Jiaotong Univ, Sch Informat Sci & Technol, Chengdu 611756, Peoples R China

[2] China Acad Informat & Commun Technol, China Telecommun Technol Labs, Beijing 100045, Peoples R China

来源：

2024 INTERNATIONAL CONFERENCE ON MICROWAVE AND MILLIMETER WAVE TECHNOLOGY, ICMMT | 2024年

基金：

中国国家自然科学基金;

关键词：

Coaxial connectors; nonlinearity; passive intermodulation (PIM); second-order;

D O I：

10.1109/ICMMT61774.2024.10672443

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A nonlinear transfer function, incorporating even-order terms, is developed to analyze the performance of passive intermodulation (PIM) in cascaded connectors. By conducting carefully designed two-tone tests, coefficients in the mathematical expression are determined. Numerical simulations utilizing the proposed model demonstrate the impact of second-order nonlinear products on third-order intermodulation (IM3) in series systems. By considering both the second-order nonlinear term and the superposition effect of multiple PIM sources, IM3 powers in series connector systems across various signal frequencies are predicted. Experimental measurements on ten N-type coaxial connectors in the GSM 900 MHz frequency band validate the theoretical calculations, showing a reduced average prediction error of 0.15 dB compared to our previous PIM model.

引用

页数：3