Cross Cancellation TechniqueEmploying an Error Amplifier

Author

Choi, Heungjae ; Jeong, Yongchae ; Kenney, J. Stevenson ; Kim, Chul Dong

Author_Institution

Dept. of Inf. & Commun. Eng. & IDEC WG, Chonbuk Nat. Univ., Jeonju

Volume

18

Issue

7

fYear

2008

fDate

7/1/2008 12:00:00 AM

Firstpage

488

Lastpage

490

Abstract

In this letter, we propose a new distortion cancellation mechanism for a balanced power amplifier (PA) structure using the cross cancellation technique employing an error amplifier. The proposed cross cancellation balanced linear PA is implemented in the IMT-2000 ( 2.14GHz) band. With commercial PAs with a peak power of 240 W for base-station application, the proposed system shows 18.6 dB improvement at an average output power of 40 dBm for adjacent channel leakage ratio measurement with wideband code division multiple access 4FA signal. The efficiency of the proposed structure is about 2% higher than the conventional feedforward amplifier for modulated carrier.

Keywords

3G mobile communication; UHF power amplifiers; code division multiple access; distortion; IMT-2000; balanced power amplifier; cross cancellation; distortion cancellation; error amplifier; feedforward amplifier; frequency 2.14 GHz; linear power amplifier; wideband code division multiple access; Balanced power amplifier (BPA); cross cancellation; feedforward technique (FFW); linearization;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2008.925098

Filename

4538237