Title :
Analysis and practical performance of a difference frequency technique for improving the multicarrier IMD performance of RF amplifiers
Author :
Modeste, M. ; Budimir, D. ; Moazzam, M.R. ; Aitchison, C.S.
Author_Institution :
Dept. of Electr. Eng. & Electron., Brunel Univ., Uxbridge, UK
Abstract :
This paper presents a difference frequency technique for IMD improvement in power amplifiers. The technique is based on feeding the original two tone signals and a signal which frequency is the difference frequency of the fundamental signals in to the amplifier. Theory, simulation and practical measurement are presented. The result of the related experiment which gave a two tones measurement of more than 40 dB reduction in the level of the third order IMD is reported.
Keywords :
intermodulation distortion; power MESFET; power amplifiers; radiofrequency amplifiers; semiconductor device measurement; MESFET; RF amplifiers; difference frequency technique; experiment; fundamental signals; intermodulation distortion; multicarrier IMD performance; power amplifiers; practical performance measurement; simulation; third order IMD; tone signals; Equations; Frequency; MESFETs; Performance analysis; Power amplifiers; Power generation; Radiofrequency amplifiers; Signal generators; Telecommunications; Voltage;
Conference_Titel :
Technologies for Wireless Applications, 1999. Digest. 1999 IEEE MTT-S Symposium on
Conference_Location :
Vancouver, BC, Canada
Print_ISBN :
0-7803-5152-5
DOI :
10.1109/MTTTWA.1999.755128
