Title :
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
Abstract :
This paper presents an extremely simple phase measurement system for the 3rd-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;
Conference_Titel :
Microwave Conference, 2005 European
Print_ISBN :
2-9600551-2-8
DOI :
10.1109/EUMC.2005.1610028
