Title :
Design of N-way distributed Doherty amplifier for WCDMA and OFDM applications
Author :
Cho, K.J. ; Kim, W.J. ; Stapleton, S.P. ; Kim, J.H. ; Lee, B. ; Choi, J.J. ; Kim, J.Y. ; Lee, J.C.
Author_Institution :
Dept. of Radio & Sci. Eng., Kwangwoon Univ., Nowon-Gu Seoul
Abstract :
A novel three-way distributed Doherty power amplifier with an extended efficiency range for WCDMA or OFDM repeater or base-station applications is presented. This distributed Doherty amplifier consists of one main amplifier and two peaking amplifiers. To achieve high efficiency at a high back-off power, the peaking amplifier structure is based on the dual-fed distributed amplifier form. The 2140 MHz measured results of the three-way distributed Doherty amplifier yielded an 11 dB power gain, with 39.5% power added efficiency at 9.5 dB back-off power
Keywords :
OFDM modulation; UHF power amplifiers; code division multiple access; distributed amplifiers; radio repeaters; 11 dB; 2140 MHz; N-way distributed Doherty amplifier; OFDM repeater; WCDMA repeater; back-off power; base-station applications; dual-fed distributed amplifier; orthogonal frequency division multiplexing; peaking amplifier structure; power added efficiency; three-way distributed power amplifier;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20070604
