Design of the RF section in a communication IC is often a challengin problem. Although several computer-aided analysis toOK$ are available they are not effectively used because there is a lack of understanding about their features and limitations. This paper attempts to explain the simulator-specific terminology without resorting to mathematical details. The shortcomings of conventional SPICElike simulators and the analyses required for RF applications are described. Various analysis methods that are currently available for RF simulation are presented and commercial simulators are compared in terms of their functionalities and limitations.