Hybrid Supply Modulator for High Power RF PA with Non-Inverting Amplifier

Abstract

In this paper, we design a Hybrid Supply Modulator (HSM) based on Non-Inverting Amplifier for High Power Amplifier (HPA) operating in C-band. Compared with the conventional HSM, the Switching stage and the R-sense stage are eliminated to prevent the power consumption, and the Non-Inverting Amplifier is applied to the linear stage. The proposed HSM consists of and Envelope Detector, Non-Inverting Amplifier and Push-Pull stage. By eliminating the Switching stage, the power consumed by the R-sense is prevented and the bias power consumption is reduced while maintaining the power modulation performance by applying the Non-Inverting Amplifier. The HSM achieved 45.9 dBm (39.8W) of output power and 93% efficiency at a supply voltage of 50V.