Concurrent multi-band power amplifier employing multi-section impedance transformer

Author

Fukuda, Atsushi ; Okazaki, Hiroshi ; Narahashi, Shoichi ; Nojima, Toshio

Author_Institution

Res. Labs., NTT DOCOMO, INC., Yokosuka, Japan

fYear

2011

fDate

16-19 Jan. 2011

Firstpage

37

Lastpage

40

Abstract

This paper presents a novel concurrent multi-band power amplifier. A newly proposed multi-section impedance transformer provides impedance matching in individual bands at the same time. Each section is synthesized to match the corresponding operation band and to prevent impedance deviation in other matched bands by employing a branched stub. A 1W-class triple-band PA following the proposed scheme achieves a maximum power added efficiency of greater than 55% with a high output power of greater than 30 dBm at 0.9 GHz, 1.8 GHz, and 2.1 GHz.

Keywords

impedance convertors; impedance matching; power amplifiers; concurrent multi-band power amplifier; frequency 0.9 GHz; frequency 1.8 GHz; frequency 2.1 GHz; impedance deviation; impedance matching; multi-section impedance transformer; power 1 W; Dual band; Frequency measurement; Impedance; Manganese; Power amplifiers; Power generation; Power transmission lines; branched stub; impedance transformer; matching network; multi-band; power amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Amplifiers for Wireless and Radio Applications (PAWR), 2011 IEEE Topical Conference on

Conference_Location

Phoenix, AZ

Print_ISBN

978-1-4244-8416-4

Electronic_ISBN

978-1-4244-8415-7

Type

conf

DOI

10.1109/PAWR.2011.5725389

Filename

5725389