LAUSR

This work demonstrated the directional passive intermodulation (PIM) product distribution effect in a microwave two‐port network using a distributed nonlinear model. The analysis is demonstrated through the comparison of PIM products at the double ends of a general two‐port network by a microstrip line. The reverse and forward PIM products are compared with the nonlinear source distribution and carrier frequency, the model and experiment demonstrates that the directional PIM effect (the difference by reverse and forward PIM) is caused by the PIM accumulation effect from multiple nonlinear sources, what is more, the frequency dependent phase relation can be one reason for the frequency dependent PIM product on wideband transmission line.