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GaN Doherty MMIC power amplifiers for satellite Ka-band downlink

Piacibello, Anna, Costanzo, Ferdinando, Giofrè, Rocco, Hayes, David, Quaglia, Roberto and Camarchia, Vittorio 2020. GaN Doherty MMIC power amplifiers for satellite Ka-band downlink. Presented at: 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC), Cardiff, Wales, 16-17 July 2020. 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC). IEEE, pp. 1-3. 10.1109/INMMiC46721.2020.9160047

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Abstract

This work presents the design and preliminary results of two integrated Doherty power amplifiers fabricated on 100nm Gallium Nitride on Silicon, targeting the satellite downlink Ka-band (17.3-20.3 GHz). The MMICs, based on different architectures, have been designed respecting the stringent limits on linearity and devices' maximum junction temperature imposed by the application. Nevertheless, an average output and efficiency higher than 36dBm and 30%, respectively, are expected across the overall band. The preliminary characterization of the MMICs shows measured small signal behaviours well in agreement with the simulations. In particular, for both MMICs, the measured small signal gain is in excess of 25 dB with both input and output return losses better than 10 dB in the whole frequency band.

Item Type: Conference or Workshop Item (Paper)
Date Type: Published Online
Status: Published
Schools: Physics and Astronomy
Engineering
Publisher: IEEE
ISBN: 9781728126456
Last Modified: 14 Oct 2020 15:07
URI: http://orca.cf.ac.uk/id/eprint/132470

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