Title :
N-Way Distributed Doherty Amplifier with an Extended Efficiency Range
Author :
Cho, Kyoung-Joon ; Kim, Wan-Jong ; Kim, Ji-Yeon ; Kim, Jong-Heon ; Stapleton, Shawn P.
Author_Institution :
Simon Fraser Univ., Burnaby
Abstract :
This paper presents a novel 3-way distributed Doherty power amplifier with an extended efficiency range for WCDMA repeater or base-station applications. This distributed Doherty amplifier consists of one main amplifier and two peaking amplifiers. In order to get 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 3-way distributed Doherty amplifier yielded 11 dB power gain, with 39.5 % power added efficiency (PAE) at 9.5 dB backoff power. High linearity performance of -54 dBc ACPR is achieved after using memory compensated digital predistortion.
Keywords :
UHF power amplifiers; code division multiple access; distributed amplifiers; N-way distributed Doherty amplifier; WCDMA repeater; base stations; digital predistortion; efficiency range; frequency 2140 MHz; gain 11 dB; peaking amplifier; power added efficiency; Bandwidth; Distributed amplifiers; FETs; High power amplifiers; Multiaccess communication; OFDM modulation; Peak to average power ratio; Power amplifiers; Power combiners; Power engineering and energy; Distributed amplifier; Doherty power amplifiers; W-CDMA; efficiency;
Conference_Titel :
Microwave Symposium, 2007. IEEE/MTT-S International
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0688-9
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2007.380578
