1. Linear--Nonlinear Interaction and Passive Intermodulation Distortion.
- Author
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Henrie, Justin J., Christianson, Andrew J., and Chappell, William J.
- Subjects
- *
MICROWAVE circuits , *MICROWAVE devices , *MICROWAVE communication systems , *RESONATORS , *ELECTRONICS - Abstract
This paper describes several consequences of a linear-nonlinear interaction that was recently found to be of importance in microwave circuits that produce passive intermodulation (PIM) distortion. This paper briefly discusses how this linear-nonlinear interaction operates in an example system. It then discusses how an understanding of the linear-nonlinear interaction allows us to distinguish between different types of nonlinearities from the power dependence of the third-order intermodulation distortion product. Next, an example uses a multiphysics simulator to demonstrate that electrothermal nonlinearities behave as expected from the linear-nonlinear interaction model. Lastly, it illustrates how simple nonlinear models characterized with one circuit can accurately predict distortion levels when the nonlinearity is placed within a very different circuit, showing that knowledge of the interaction gives the ability to accurately predict the behavior of PIM-producing components in a variety of circuits such as resonators, filters, and matching networks. [ABSTRACT FROM AUTHOR]
- Published
- 2010
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