Novel Techniques for 5G/6G Power Amplifier Operation Constraints Mitigation for Satellite-Cellular Applications

This paper presents the constraints and mitigation strategies imposed on a radio frequency power amplifier (RF PA) design for satellite-cellular wireless communication. Novel wideband single-stage class AB PA design for 5G fixed wireless access (FWA) user equipment (UE) has been proposed. This is based on a 0.25 μm GaN on SiC HEMT technology at sub-6 GHz 5G. This range targets the n77, n78, and n79 5G new radio (NR) bands of interest mandated by the third-generation partnership project (3GPP). Our systematic simulation design approach applies careful impedance matching network tuning to address the challenges of 5G multiband/multi-standard PA operation. The proposed PA demonstrates a baseline class-AB ideal peak efficiency of 58%. The input return loss is less than −10 dB for the whole band. A substantial peak output power of 34 dBm is for FWA UEs. The gain compression is also 2.7 dB and the compressed power gain at peak PAE is 9.1 dB. It maintains a flat small signal response gain response with a modest in-band ripple less than 3 dB. Moreover, the PA has a stability factor of 2.6 accounting for manufacturing tolerances and ensuring reliable performance in real-world conditions within an additively manufactured electronics technology.