Research and realization of 150W ultra-wideband reconfigurable RF power amplifier

Abstract

This paper presents a technique for designing broadband reconfigurable power amplifier matching networks using equal Q values. The precise values of the matching elements are determined while also considering restrictions on the impedance transformation ratio and Q value. To achieve the desired band reconfigurability, we leverage the distinct characteristics of the devices at different frequencies and wavelengths to create an equal Q matching network and subsequently calculate the second band. An ultra-wideband reconfigurable RF power amplifier is created to test the viability of the suggested design approach. The test results show that the output power of the amplifier is 51.8-52.5dBm and the drain efficiency is 45%-62% in the frequency ranges of 170-400MHz and 470-860MHz. In addition, the linearity test results of the circuit using a two-tone signal with a frequency interval of 0.1MHz show that the IMD3 value of the whole bandwidth is lower than -20dBc at an output power of 47dBm.