Title :
A novel series diode linearizer for mobile radio power amplifiers
Author :
Yamauchi, K. ; Mori, K. ; Nakayama, M. ; Itoh, Y. ; Mitsui, Y. ; Ishida, O.
Author_Institution :
Inf. Technol. R&D Center, Mitsubishi Electr. Corp., Kanagawa, Japan
Abstract :
A novel series diode linearizer has been developed for mobile radio power amplifiers. It is composed of a series diode with a parallel capacitor, which provides positive amplitude and negative phase deviations with the increase of input power, and can compensate AM-AM and AM-PM distortions of power amplifiers. Applying this linearizer to 1.9 GHz MMIC power amplifier for the Japanese Personal Handy-phone System (PHS), an improvement of adjacent channel leakage power (ACP) up to 5 dB has been achieved for the /spl pi//4-shifted QPSK modulated signal.
Keywords :
MMIC power amplifiers; UHF integrated circuits; UHF power amplifiers; compensation; electric distortion; land mobile radio; linearisation techniques; /spl pi//4-shifted QPSK modulated signal; 1.9 GHz; AM-AM distortions; AM-PM distortions; Japanese PHS; Japanese Personal Handy-phone System; MMIC power amplifier; UHF; distortion compensation; mobile radio power amplifiers; parallel capacitor; series diode linearizer; Capacitance; Capacitors; Diodes; Equivalent circuits; Fourier transforms; Impedance; Land mobile radio; Microwave Theory and Techniques Society; Phase measurement; Power amplifiers;
Conference_Titel :
Microwave Symposium Digest, 1996., IEEE MTT-S International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-3246-6
DOI :
10.1109/MWSYM.1996.511066
