Linearity Improved Doherty Power Amplifier Using Composite Right/Left-Handed Transmission Lines

Author

Ji, Seung Hun ; Eun, Sang Ki ; Cho, Choon Sik ; Lee, Jae W. ; Kim, Jaeheung

Author_Institution

Sch. of Electron., Korea Aerosp. Univ., Goyang

Volume

18

Issue

8

fYear

2008

Firstpage

533

Lastpage

535

Abstract

A Doherty power amplifier using composite right/left-handed transmission lines (CRLH-TL) is proposed for linearity improvement. The lambda/4 transmission line incorporating CRLH-TL is designed to suppress the second harmonic of the output of the main amplifier. The output power of the proposed power amplifier at the fundamental frequency (2.30 GHz) shows 31.0 dBm with 13 dBm input power excited. The Doherty power amplifier using CRLH-TL improves the linearity considerably compared to that without employing CRLH-TL.

Keywords

UHF power amplifiers; harmonic analysis; transmission lines; Doherty power amplifier; composite right-left-handed transmission lines; frequency 2.30 GHz; fundamental frequency; power input; second harmonic suppression; Delay; Digital modulation; Frequency; High power amplifiers; Impedance; Linearity; Power amplifiers; Power generation; Power transmission lines; Transmission line theory; Composite right/left-handed transmission line (CRLH-TL); Doherty power amplifier;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2008.2001014

Filename

4588991