Modeling and compensation of thermal effects in power amplifiers

Power amplifier is used at the front end of any communication system. But this device suffers from thermal effects. Thermal effects cause in-band and out-band distortion. Thus compensation of thermal effects is of major concern. In this paper the variation of in-band and out-band with thermal effects has been studied in terms of lower channel and upper channel adjacent channel power ratio. The spectral re-growth has also been plotted and effect of thermal effects on signal peak to average power ratio has also been simulated. Also a technique has been proposed to compensate the thermal effects.