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IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 53, NO. 3, MARCH 2005 1089 An Intelligently Controlled RF Power Amplifier
 

Summary: IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 53, NO. 3, MARCH 2005 1089
An Intelligently Controlled RF Power Amplifier
With a Reconfigurable MEMS-Varactor Tuner
Dongjiang Qiao, Member, IEEE, Robert Molfino, Steven M. Lardizabal, Member, IEEE, Brandon Pillans,
Peter M. Asbeck, Fellow, IEEE, and George Jerinic
Abstract--This paper presents an intelligently controlled RF
power amplifier with a reconfigurable output tuner using micro-
electromechanical system (MEMS) switches and a varactor. By
switching on/off the MEMS switches and varying the bias voltage
of the varactor, the performance of the amplifier is optimized
for input signals with known or unknown frequencies in a range
of 812 GHz. Fabrication-related unit-to-unit variations of the
amplifier are overcome by the reconfigurable tuner. Directed
algorithms based on a characterization table and on black-box
genetic algorithms are developed for optimization and search.
Index Terms--Genetic algorithm, intelligent RF front-ends,
power amplifier, reconfigurable tuner, RF microelectromechnical
system (MEMS) switches, tunable matching networks.
I. INTRODUCTION
ADAPTIVE RF front ends provide exciting new oppor-

  

Source: Asbeck, Peter M. - Department of Electrical and Computer Engineering, University of California at San Diego

 

Collections: Engineering