City University of Hong Kong

Xinyu Zhou

Wing Shing Chan

The present invention provides a wideband Doherty power amplifier comprising: a main power amplification device; an auxiliary power amplification device arranged in parallel with the main power amplification device; and a coupled phase compensation network configured for compensating a phase shift between the main power amplification device and the auxiliary power amplification device. The phase compensation network comprising a first transmission line section; a second transmission line section extending substantially collinearly with the first transmission line section; and two pairs of end-connected coupled transmission lines connected in parallel between the first transmission line section and the second transmission line section. The provided Doherty power amplifier demonstrated operation at 6 dB back-off between 1.3-2.3 GHz with efficiency in excess of 41%, which can be used in modern and future wireless communication systems which require power amplifiers operating over a wide frequency range.

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Stanford, CA, United States of America

Xinyu Zhou