Design of an ultra-wideband high-efficiency power amplifier based on multi-paths impedance matching structure

Abstract

In this letter, a design method of ultra-wideband power amplifier (PA) with multi-paths (MPs) impedance matching structure is proposed. MPs with unique impedance matching structure is combined with extended continuous Class-F (ECCF) theory to achieve ultra-wideband. Each path is responsible for the impedance matching of the specified band and apply to the input matching network (IMN) and output impedance matching network (OMN). To verify the proposed structure, an ultra-wideband PA is designed and fabricated by using CGH40010F. The PA operates over a multi-octave band from 0.5-4.3GHz, corresponding to the fractional bandwidth of 158.3%. This circuit provides drain efficiency (DE) of 57.7-77.2% and the output power between 39.4-42.2dBm over the operating band.