Passive intermodulation in finite lengths of printed microstrip lines

Dmitry Zelenchuk, Alexey Shitvov, Alexander Schuchinsky, Vincent Fusco

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


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 non-linearity 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. © 2008 IEEE.
Original languageEnglish
Article number4657387
Pages (from-to)2426-2434
Number of pages9
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number11
Publication statusPublished - Nov 2008


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