Optimizing RF front ends for low power

This paper discusses optimization for the power dissipation of RF front end s in portable wireless devices. A breakthrough in power dissipation can be achieved by simultaneously optimizing the antenna interface, circuits, and IC technology of such devices. A model that predicts the minimum power diss ipation of a front end of both short-range and long-range connections will be introduced. Using these models, the impact of the antenna interface on t he power disipation will be assessed. Using two antennas with equal gain co mbining, a typical power dissipation reduction of 2.5 to 30 times can be ac hieved. Using high-impedance circuits for short-range systems in combinatio n with silicon-on-anything technology, a further reduction of power dissipa tion by up to one order of magnitude can be realized.