A Direct Matching Network Synthesization Technique Designed for Class-J Power Amplifier

In this paper, a novel direct matching network (MN) synthesization method is presented to design a broadband class-J PA. By straightforwardly optimize the characteristic impedance (physical width) and electrical length (physical length) of each distributed element in a preselected configuration, the proposed method improves design flexibility and matching effects. A novel target function (TF) indicating the degree of proximity for the realized impedance to the optimal transistor impedance is proposed. The designed class-J PA using the proposed method shows a broadband performance of greater than 62% PAE, the gain of more than 10.8 dB and almost 40 dBm output power with a 2.5-3.8 GHz (41.3%) bandwidth.