A 28GHz Compact 3-Way Transformer-Based Parallel-Series Doherty Power Amplifier With 20.4%/14.2% PAE at 6-/12-dB Power Back-off and 25.5dBm P<sub>SAT</sub> in 55nm Bulk CMOS

Zonglin Ma, Kaixue Ma, Keping Wang, Fanyi Meng

20222022 IEEE International Solid- State Circuits Conference (ISSCC)34 citationsDOI

Abstract

The 28GHz band for fifth-generation (5G) millimeter-wave wireless communication supporting high-order QAM, OFDM, and carrier aggregation (CA) requires excellent power and spectrum efficiency for higher data-rate throughput. High-order modulation often forces power amplifiers (PAs) to operate at deep power back-off (PBO) (i.e., 12dB or even higher), where typical PAs always suffer from efficiency degradation. Therefore, efficiency enhancement at deep PBO is critical to improving the average efficiency of transmitters.

Topics & Concepts

AmplifierElectrical engineeringQuadrature amplitude modulationExtremely high frequencyOrthogonal frequency-division multiplexingPower-added efficiencyTransformerElectrical efficiencyRF power amplifierElectronic engineeringHafniumWirelessPower (physics)Computer scienceOptoelectronicsMaterials scienceCMOSTelecommunicationsBit error rateEngineeringPhysicsVoltageChannel (broadcasting)Quantum mechanicsMetallurgyZirconiumAdvanced Power Amplifier DesignRadio Frequency Integrated Circuit DesignMicrowave Engineering and Waveguides