High-efficiency multimode HF/VHF transmitter for communication and jamming

Author

Raab, Frederick H. ; Rupp, Daniel J.

Author_Institution

Green Mountain Radio Res. Co., Colchester, VT, USA

fYear

1994

fDate

2-5 Oct 1994

Firstpage

880

Abstract

The high-efficiency HF/VHF multimode transmitter described in this paper is based upon the Kahn EER (Envelope-Elimination-and-Restoration) technique. The major subsystems are a class-D RF power amplifier (PA), a class-S high-level amplitude modulator, a single-sideband modulator, a delay-compensation circuit, and a frequency translator. The efficiency is about 60 percent for all signal amplitudes, which makes its average efficiency about 60 percent for voice and noise signals about three times that of a transmitter with a conventional class-B PA. For voice-bandwidth signals, the IMD products are 43 cc dB or more below the peak output

Keywords

jamming; radio transmitters; radiocommunication; 1 to 60 MHz; 100 W; 60 percent; Kahn EER technique; class-D RF power amplifier; class-S high-level amplitude modulator; communication; delay-compensation circuit; efficiency; frequency translator; high-efficiency multimode HF/VHF transmitter; jamming; noise signals; single-sideband modulator; voice-bandwidth signals; Amplitude modulation; Envelope detectors; High power amplifiers; Jamming; Linearity; Phase modulation; Radio frequency; Radiofrequency amplifiers; Transmitters; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Military Communications Conference, 1994. MILCOM '94. Conference Record, 1994 IEEE

Conference_Location

Fort Monmouth, NJ

Print_ISBN

0-7803-1828-5

Type

conf

DOI

10.1109/MILCOM.1994.473988

Filename

473988