The wireless communications revolution has been driven by a confluence of technological advances, including improvements in communications theory, very large-scale integration (VLSI) technology, and radio frequency (RF) microelectronics. The microwave power amplifier represents one of the major factors in the low-cost and low-power implementation of these systems, since they are required to deliver tens of watts of power (in the case of a base station) with exacting standards of linearity and direct current (dc) power efficiency.

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