Highly efficient broadband continuous Class-F power amplifier with a novel harmonic matching network

Abstract

In this letter, we propose a methodology for designing high efficiency broadband harmonic-controlled power amplifiers(PAs)with a novel harmonic matching network. This network consists of three secondharmonic open circuit microwave lines and three third-harmonic short circuit microwave lines, each corresponding to different wavelengths for different frequencies. It can improve the efficiency and bandwidth of PAs by controlling harmonic match impedance. Through the proposed network, we design and fabricate a highly efficient broadband continuous Class-F PA using a CGH40010F GaN HEMT device. The measurement results show that the drain efficiency of 71.4% to 82.4% (the average efficiency of 76.9%) and output power of 40.4dBm to 42.6dBm are achieved at 1.3GHz-2.5GHz, respectively.

A broadband high-efficiency GaN-based power amplifier using an improved continuous mode

“…Bandwidth extension of power amplifiers can also be achieved by amplifier architectures with feedback loops, but it requires additional feedback loops, resulting in more complex circuits. The broadband power amplifiers with high efficiency and a simple circuit topology can be realized using the continuous mode, which is one of the most promising methods [16]. PA design based on continuous modes usually introduces variable components in drain voltage or current expressions [17][18][19].…”