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Design of a 28 GHz differential GaAs power amplifier with capacitive neutralization for 5G mmwave applications

Host Publication: 17th IEEE International New Circuits and Systems Conference, NEWCAS 2019

Authors: D. Yan, M. Ingels, G. Mangraviti, Y. Liu, B. Parvais, N. Waldron, N. Collaert and P. Wambacq

Publisher: Institute of Electrical and Electronics Engineers Inc

Publication Date: Jun. 2019


Abstract:

This paper describes the design of a 28 GHz power amplifier (PA) in a commercial GaAs mHEMT technology using concepts that are typical for mm-wave CMOS design. Simulations show a 1dB output compression point of around 23 dBm with a 30% power-added efficiency (PAE) at 28 GHz, while providing a gain of 12 dB. Comparison with the performance of a similar 28 GHz fully-depleted Silicon-On-Insulator (FDSOI) PA shows an increase of the compression point with 10 dB while efficiency is comparable. The high compression point of this GaAsPA offers a margin for system optimization such as a reduction of the number of antennas for beamforming.

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