Title :
High efficiency amplifier using rectangular waveform
Author_Institution :
Dept. of Electr. Eng., Osaka Inst. of Technol., Japan
Abstract :
This paper describes a new high efficiency amplifier. It consists of two circuits: the first one produces the rectangular waveform, and the second one makes its operating angle (current flowing angle) small. Using this waveform with small operating angle, we can obtain an amplifier having large power added efficiency. A single power amplifier using the rectangular waveform was constructed and tested. In the experiment, the operating frequency was in the 0.9 GHz band. The maximum power was 5.1 W, and the power added efficiency was 65% and 76% when the operating angle was 70/spl deg/ and 30/spl deg/, respectively.<>
Keywords :
UHF power amplifiers; field effect transistor circuits; 0.9 GHz; 5.1 W; 65 to 76 percent; UHF power amplifier; current flow angle; high efficiency amplifier; operating angle; power added efficiency; rectangular waveform; Capacitors; Circuit synthesis; Circuit testing; Energy consumption; High power amplifiers; Mobile communication; Power amplifiers; Signal synthesis; Telephony; Voltage;
Conference_Titel :
Microwave Symposium Digest, 1995., IEEE MTT-S International
Conference_Location :
Orlando, FL, USA
Print_ISBN :
0-7803-2581-8
DOI :
10.1109/MWSYM.1995.406010
