Broadband Class-E Power Amplifier Design Employing a Double Reactance Compensation Matching Network

Abstract

In this paper, a double reactance compensation matching network is presented for designing a broadband Class-E power amplifier (CEPA). By theoretically analyzing the double reactance compensation principle and the condition satisfied Class-E operation mode, this double reactance compensation network is used to apply in the output circuits design of the CEPA, which can not only compensate the imaginary part of the optimal output impedance but also provide a constant load phase over wider bandwidth range. Hence, it indicates that the bandwidth of power amplifier can be enhanced on Class-E operation mode. It demonstrates a high-efficiency broadband CEPA is designed based on GaN CGH40010 devices. Experiment results show that drain efficiency of 63.4%-76.4% and output power of 39.6-42.5 dBm are obtained in 1.0-3.6 GHz. When driven a 100MHz five-carrier OFDM signal, the ACPR is measured better than -45.6 dBc with DPD.