Title :
A wideband Sequential Power Amplifier
Author :
Merrick, B. ; King, Jacob ; Brazil, Thomas J.
Author_Institution :
RF & Microwave Res. Group, Univ. Coll. Dublin, Dublin, Ireland
Abstract :
In this work, a wide bandwidth Sequential Power Amplifier (SPA) is demonstrated for the first time. Using wideband and high efficiency 10W and 45W amplifiers, an SPA is described, capable of delivering high efficiency at back-off without the bandwidth limitations of the traditional Doherty PA. Measurement results of the implemented amplifier are presented, with an average back-off drain efficiency of 59% achieved between 1.45 GHz and 2.4 GHz, and a peak back-off drain efficiency of 65% at 1.7 GHz.
Keywords :
UHF power amplifiers; wideband amplifiers; average back-off drain efficiency; efficiency 59 percent; efficiency 65 percent; frequency 1.45 GHz; frequency 1.7 GHz; frequency 2.4 GHz; high-efficiency amplifier; peak back-off drain efficiency; power 10 W; power 45 W; wide-bandwidth SPA; wideband sequential power amplifier; Couplers; Field programmable gate arrays; IEEE Xplore; Radio frequency; Rain; Broadband; high efficiency; power amplifiers (PAs);
Conference_Titel :
Microwave Symposium (IMS), 2014 IEEE MTT-S International
Conference_Location :
Tampa, FL
DOI :
10.1109/MWSYM.2014.6848592
