Passive Intermodulation in Finite Lengths of Printed Microstrip Lines
Passive Intermodulation in Finite Lengths of Printed Microstrip Lines
复制标题
有限长度印刷微带线中的无源互调
DOI：
10.1109/tmtt.2008.2005886
复制
发表时间：
2008
影响因子：
4.3
通讯作者：
V. Fusco
中科院分区：
文献类型：
--
作者：
D. Zelenchuk;A. Shitvov;A. Schuchinsky;V. Fusco
本文讨论了印刷传输线中无源互调（PIM）产生的理论问题。为了阐明PIM产生的机理，提出了一种具有分布非线性的输电线路长度模型。通过对微带线沿线PIM产品分布的近场测量，验证了该模型的有效性。详细分析了非线性混频、功耗和负载匹配对PIM产品的影响。所得结果揭示了具有分布非线性的有限长度印刷线中PIM产生的基本特性，并确定了缓解PIM的可能方法。首次证明了在具有分布非线性的匹配传输线中，非线性散射会产生反向PIM产物。
This paper addresses the theoretical aspects of passive intermodulation (PIM) generation in printed transmission lines. In order to elucidate the mechanisms of PIM generation, a new model of the transmission line length with distributed nonlinearity is proposed. The developed model has been validated by the near-field measurements of PIM product distributions along the microstrip lines. The contributions of nonlinear mixing, power dissipation, and load matching to PIM products have been analyzed in detail. The obtained results reveal the fundamental properties of PIM generation in finite lengths of printed lines with distributed nonlinearity and identify possible means for PIM mitigation. It was shown for the first time that the reverse PIM products in a matched transmission line with distributed nonlinearity are generated due to nonlinear scattering.