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

fYear

2007

fDate

3-8 June 2007

Firstpage

1581

Lastpage

1584

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium, 2007. IEEE/MTT-S International

Conference_Location

Honolulu, HI

ISSN

0149-645X

Print_ISBN

1-4244-0688-9

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2007.380578

Filename

4264147