Title :
A high efficiency feedforward amplifier with a series diode linearizer for cellular base stations
Author :
Horiguchi, K. ; Nakayama, M. ; Sakai, Y. ; Totani, K. ; Senda, H. ; Ikeda, Y. ; Ishida, O.
Author_Institution :
Inf. Technol. R&D Center, Mitsubishi Electr. Corp., Kanagawa, Japan
Abstract :
A feedforward power amplifier (FFPA) with a series diode linearizer using a bias feed resistance is presented. To improve overall feedforward amplifier efficiency, a series diode linearizer is used to provide main amplifier linearization. FFPA efficiency optimization design considering FET efficiency and linearity trade-off has been demonstrated. The developed FFPA achieved the high efficiency of 10% and output power of 45.6 dBm at 10 MHz offset ACLR -50 dBc under W-CDMA 2 carriers signal.
Keywords :
UHF power amplifiers; cellular radio; circuit optimisation; feedforward; linearisation techniques; 10 percent; 2.12 GHz; W-CDMA carrier signal; amplifier linearization; bias feed resistance; cellular base stations; efficiency optimization design; feedforward power amplifier; high efficiency feedforward amplifier; series diode linearizer; Base stations; Circuits; Delay; Design optimization; FETs; Feeds; Linearity; Power amplifiers; Radiofrequency amplifiers; Schottky diodes;
Conference_Titel :
Microwave Symposium Digest, 2001 IEEE MTT-S International
Print_ISBN :
0-7803-6538-0
DOI :
10.1109/MWSYM.2001.967012
