Balanced class e amplifier based multimode modulator

H.I. Cantú, Mury Thian, V.F. Fusco

Research output: Contribution to conferencePaperpeer-review


In this paper we present an adaptation to the classical I/Q modulator topology which simultaneously allows it to operate both as a multi-modulation standard modulator, and as a high efficiency balanced amplifier. This is made possible by concurrently exploiting the ability of the Class E amplifiers to produce variable output power at maximum power added efficiency, PAE, by simple dc bias control while faithfully reproducing phase encoded signals. Experimental evidence for the behaviour of the modulator when operated in QPSK mode at 2.33 GHz with a 1 Msymbol/s rate shows that Error Vector Magnitude of less than 5% with amplifier PAE of 65% is possible. The multimode modulator presented here should lead to significantly reduced complexity, enhanced functionality transceivers for use in dc power sensitive handheld wireless applications. © 2007 EuMA.
Original languageEnglish
Number of pages3
Publication statusPublished - Oct 2007
Event37th European Microwave Conference - Munich, Germany
Duration: 01 Oct 200701 Oct 2007


Conference37th European Microwave Conference


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