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linear simulator vs nonlinear simulator used for RF/Microwave Design

This page on linear simulator vs nonlinear simulator describes difference between linear simulator and nonlinear simulator used for RF/Microwave design.

The linear simulator uses nodel analysis to simulate the characteristic of the RF/Microwave circuit. This simulator is used for designing the RF LNA,filters,couplers etc. These devices are characterized by an admittance matrix.

The linear simulator provides results/measurements viz. gain,noise figure,stability,reflection coefficients, noise circles as well as gain circles.

Nonlinear simulators typically use harmonic balance or volterra series as source to excite the RF/Microwave circuit under simulation. Both have their unique applications.

Harmonic Balance based analysis helps in nonlinear circuits viz. PA,Mixer and frequency Multipliers.

Volterra Series based analysis helps in weak nonlinear circuit analysis for example, amplifier operating below 1dB gain compression point.

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