A 74W/48V Monolithic-GaN Integrated Adjustable Multilevel Supply Modulator for 5G Base-Station Massive-MIMO Arrays. - Hieu Minh Pham; Peter M. Asbeck; Donald F. Kimball; Navneet Sharma; Shenggang Dong; Masoud Shahshahani; Won-Suk Choi 004; Gary Xu; Marcus Michel; Ratul Das; Robert Beach; Hanh-Phuc Le (ISSCC, 2025)