A simple and accurate measurement technique for IM3 phases in RF power amplifiers

Author

Lee, Seung-Yup ; Lee, Yong-Sub ; Jeong, Yoon-Ha

Author_Institution

Dept. of Electron. & Electr. Eng., Pohang Univ. of Sci. & Technol., Gyungbuk, South Korea

Volume

2

fYear

2005

fDate

4-6 Oct. 2005

Abstract

This paper presents an extremely simple phase measurement system for the 3^rd-order inter-modulation (IM3) phases of RF power amplifiers. The system can accurately and directly measure the phase distortions of the intermodulation (IM) products as well as fundamental signals in power amplifiers themselves. We also implement a 30 W RF power amplifier with an LDMOSFET in wideband code division multiple access (WCDMA) band, and the phase distortions of the main power amplifier are investigated with the phase measurement system under various tone-spacings, gate bias voltages, and output power levels.

Keywords

MOSFET circuits; code division multiple access; distortion; intermodulation; power amplifiers; radiofrequency amplifiers; 30 W; 3rd-order intermodulation phases; IM3 phases; LDMOSFET; RF power amplifiers; WCDMA band; gate bias voltages; output power levels; phase distortions; phase measurement system; tone-spacings; wideband code division multiple access; Broadband amplifiers; Distortion measurement; Measurement techniques; Multiaccess communication; Phase distortion; Phase measurement; Power amplifiers; Power measurement; Radio frequency; Radiofrequency amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2005 European

Print_ISBN

2-9600551-2-8

Type

conf

DOI

10.1109/EUMC.2005.1610028

Filename

1610028