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Introduction to RF Simulation and its Application

The Designer's Guide Community downloaded from Introduction to RF Simulation and its Application Ken Kundert Designer's Guide Consulting, Inc. Version 2, 23 April 2003 Radio-frequency (RF) circuits exhibit several distinguishing characteristics that make them difficult to simulate using traditional Spice transient analysis. The various exten- sions to the harmonic balance and shooting method Simulation algorithms are able to exploit these characteristics to provide rapid and accurate Simulation for these circuits. This paper is an Introduction to RF Simulation methods and how they are applied to make common RF measurements. It describes the unique characteristics of RF circuits, the methods developed to simulate these circuits, and the Application of these methods. Search Terms RF Simulation , shooting methods, harmonic balance, circuit Simulation , SpectreRF, modulation, oscillator phase noise, cyclostationary noise.

communication systems [1,16,47,48]. In this architecture the RF input signal is directly converted to baseband in one step. Thus, most of the gain will be at baseband and the LO will be at the same frequency as the input signal. In this case, the ability to deter-mine the impact of small amou nts of coupling is quite important and will require ...

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