A Novel Design Methodology for Multi-Band Power Amplifier Matching Network

This article proposes a novel and simple method for multi-band matching networks (MN). The method is based on the idea of broadband matching network (BMN) which was applied to the broadband power amplifier (PA). For resonators operating in a BMN, designing a parallel resonator with a series reactance or a series resonator with a parallel reactance, is a feasible method to obtain a transmission zero. To validate this theory, a dual-band BPF is designed with center frequencies of 1.1GHz and 2.3GHz, the fractional bandwidth are 45% and 36.4%, respectively. Finally, the filter is used for designing a dual-band P A, and the measured results of power output (Pout) are met with the designed specifications.