Title :
Electronically tunable class-E power amplifier
Author_Institution :
Green Mountain Radio Res. Co., Colchester, VT, USA
Abstract :
The 20-W class-E power amplifier (PA) described here is electronically tunable from 19 to 31 MHz (ratio 1.67). This PA employs a single RF-power MOSFET and operates from 25 V. The output-tuning network employs fixed inductors and high-voltage MOSFETs for variable capacitors. The PA achieves an efficiency of 61 to 71 percent and has nearly constant output power across the band. It has excellent amplitude-modulation linearity for Kahn-technique transmitters, with two-tone IMDs at -40.4 dBc.
Keywords :
MOSFET circuits; amplitude modulation; circuit tuning; intermodulation distortion; power MOSFET; power amplifiers; radiofrequency amplifiers; 19 to 31 MHz; 20 W; 25 V; 61 to 71 percent; Kahn technique transmitter; RF power MOSFET; amplitude modulation linearity; class-E power amplifier; electronic tuning; fixed inductor; high-voltage MOSFET; two-tone IMD; variable capacitor; Bandwidth; Broadband amplifiers; Capacitance; Capacitors; Circuit optimization; Filters; Power amplifiers; Power generation; Radio frequency; Tuning;
Conference_Titel :
Microwave Symposium Digest, 2001 IEEE MTT-S International
Conference_Location :
Phoenix, AZ, USA
Print_ISBN :
0-7803-6538-0
DOI :
10.1109/MWSYM.2001.967190
