Title :
A novel efficiency improvement technique for Doherty power amplifiers
Author :
Modi, Sankalp ; Prakash, R. ; Yanduru, Naveen ; Balsara, Poras
Author_Institution :
Univ. of Texas at Dallas, Richardson, TX, USA
Abstract :
A new efficiency improvement technique is proposed for Doherty power amplifiers (PA), which combines supply switching with load modulation. The proposed technique was demonstrated with a commercial prototype GaN PA. Measurement and simulation results for the Doherty PA, using a 5 MHz LTE signal, showed that the proposed technique significantly improved the average power-added efficiency (PAE) to ~55 %.
Keywords :
HF amplifiers; Long Term Evolution; gallium compounds; power amplifiers; Doherty PA; Doherty power amplifiers; GaN; LTE signal; average power-added efficiency; efficiency improvement technique; frequency 5 MHz; load modulation; supply switching; Gain; Logic gates; Modulation; Power amplifiers; Power demand; Power generation; Switches; Doherty; power amplifier (PA); power-added efficiency (PAE);
Conference_Titel :
Wireless and Microwave Circuits and Systems (WMCS), 2014 Texas Symposium on
Conference_Location :
Waco, TX
DOI :
10.1109/WMCaS.2014.7015876
