DocumentCode :
1888971
Title :
A novel high frequency single-sideband transmitter using constant-envelope modulation
Author :
Campbell, R.L.
Author_Institution :
TriQuint Semicond., Hillsboro, OR, USA
Volume :
2
fYear :
1998
fDate :
7-12 June 1998
Firstpage :
1121
Abstract :
A technique for single-sideband generation has been developed that obtains the desired output as the sum of three or more constant envelope signals. The summation may be performed by a passive summing network, or in space as the output of an antenna array in a particular direction. This paper describes a practical implementation of the technique, with lower sideband output at 7.2 MHz. Four constant-envelope signals from hard-limiting differential amplifiers drive a passive combiner to obtain +16 dBm peak-envelope-power lower-sideband. All undesired outputs are suppressed more than 30 dB. System requirements for high-power high-efficiency operation are discussed.
Keywords :
modulation; power combiners; radio transmitters; HF SSB transmitter; constant-envelope modulation; hard-limiting differential amplifiers; high frequency transmitter; high-efficiency operation; high-power operation; passive combiner; passive summing network; single-sideband generation technique; single-sideband transmitter; Amplitude modulation; Antenna arrays; Circuits; Differential amplifiers; Directive antennas; Distortion; Passive networks; Radio frequency; Radio transmitters; Signal generators;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Symposium Digest, 1998 IEEE MTT-S International
Conference_Location :
Baltimore, MD, USA
ISSN :
0149-645X
Print_ISBN :
0-7803-4471-5
Type :
conf
DOI :
10.1109/MWSYM.1998.705190
Filename :
705190
Link To Document :
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