A high-efficiency 28GHz outphasing PA with 23dBm output power using a triaxial balun combiner. - Bagher Rabet; James F. Buckwalter (ISSCC, 2018)

A 28 GHz Single-Input Linear Chireix (SILC) Power Amplifier in 130 nm SiGe Technology. - Bagher Rabet; Peter M. Asbeck (IEEE J. Solid State Circuits, 2020)