This book covers the RF domain from the very basics to the more complicated, from the device level to the integrated circuits level. The discussion takes the reader from the beginning of conceiving an optimized silicon wafer for RF applications, through the RF oriented device conception and the in-depth RF device characterization, in order to achieve a fully optimized, RF integrated circuit. Throughout this cycle, performance optimization is addressed from various perspectives, including high temperature (an unavoidable side effect in today's devices), low power consumption (required in all portable applications), noise, nonlinearities, crosstalk, etc.