Wideband Sequential Circulator Load Modulated Amplifier with Back-off Efficiency Enhancement
Paper in proceeding, 2022

This paper demonstrates a novel power amplifier (PA) architecture; the sequential circulator load modulated amplifier (SCLMA). The sequential configuration resulted in excellent bandwidth and extended back-off efficiency enhancement, making it suitable for modern communication scenarios with large peak-to-average-power-ratio (PAPR) signals. A wideband prototype PA based on GaN transistors and a commercial off-the-shelf circulator is employed to validate the SCLMA concept. The experimental results exhibit a drain efficiency of 55-68 % at the peak output power and 46-53 %
at 8-dB output power back-off across 2.0-3.0 GHz. Combined with the measured peak output power of 42.7±0.7 dBm in the same range, make it a promising candidate for use in modern energy-efficient wireless communication transmitters.

non-reciprocal

gallium nitride (GaN)

load modulation

power amplifier (PA)

wideband

energy efficiency

sequential operation

Circulator

Author

Han Zhou

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Jose-Ramon Perez-Cisneros

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Christian Fager

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

2022 52nd European Microwave Conference, EuMC 2022

214-217
9782874870699 (ISBN)

IEEE European Microwave Conference, EuMC 2022
Milan, Italy,

Areas of Advance

Information and Communication Technology

Subject Categories

Telecommunications

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.23919/EuMC54642.2022.9924268

More information

Latest update

5/1/2024 1