Abstract
This paper presents a sub-6 GHz MMIC Doherty power amplifier (DPA) for 5G communication applications based on a 0.25-μ mGaN HEMT process. The impedance inverter of the DPA is realized by combining a compact transmission line network with two shunt capacitors. Also, the ratio of power cells in the main and auxiliary amplifiers is optimized to achieve a high efficiency in output power back-off. The measured peak output power and P1d B are 38.7 and 32.1 dBm, respectively at 5.9 GHz. The power-added-efficiency (PAE) at a 6-dB output power backoff is up to 49.5%.
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Li, S. H., Hsu, S. S. H., Zhang, J., & Huang, K. C. (2018). A Sub-6 GHz Compact GaN MMIC Doherty PA with a 49.5% 6 dB back-off PAE for 5G Communications. In IEEE MTT-S International Microwave Symposium Digest (Vol. 2018-June, pp. 805–807). Institute of Electrical and Electronics Engineers Inc. https://doi.org/10.1109/MWSYM.2018.8439474
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