Title :
Electro-Thermal Theory of Intermodulation Distortion in Lossy Microwave Components
Author :
Wilkerson, Jonathan R. ; Gard, Kevin G. ; Schuchinsky, Alexander G. ; Steer, Michael B.
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC
Abstract :
An analytic formulation of dynamic electro-thermally induced nonlinearity is developed for a general resistive element, yielding a self-heating circuit model based on a fractional derivative. The model explains the 10 dB/decade slope of the intermodulation products observed in two-tone testing. Two-tone testing at 400 MHz of attenuators, microwave chip terminations, and coaxial terminations is reported with tone spacing ranging from 1 to 100 Hz.
Keywords :
attenuators; coaxial waveguides; intermodulation distortion; microwave circuits; attenuators; coaxial terminations; electro-thermal theory; fractional derivative; intermodulation distortion; lossy microwave components; microwave chip terminations; resistive element; self-heating circuit; two-tone testing; Compact modeling; electrothermal; fractional calculus; fractional derivative; heat transfer; intermodulation distortion; multiphysics modeling; nonlinear computer-aided design (CAD); passive intermodulation distortion (PIM); thermal model; transient;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2008.2007084
