Title :
Third-order intermodulation reduction by harmonic injection in a TWT amplifier
Author :
Wirth, Michael ; Singh, Aarti ; Scharer, John ; Booske, John
Author_Institution :
Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA
fDate :
6/1/2002 12:00:00 AM
Abstract :
A method for reducing the two-tone third-order intermodulation products arising from two carrier frequencies at 1.95 and 2.00 GHz is demonstrated in a traveling wave tube-distributed amplifier. The optimum amplitude and phase of an injected second harmonic and the resulting intermodulation suppression of up to 24.2 dB are examined for fundamental drive levels approaching saturation
Keywords :
UHF amplifiers; distributed amplifiers; harmonic generation; interference suppression; intermodulation distortion; travelling wave amplifiers; 1.95 GHz; 2.00 GHz; TWT amplifier; TWT-distributed amplifier; harmonic injection; helical TWT; matched terminations; optimum amplitude; optimum phase; third-order intermodulation reduction; two-tone intermodulation products; Capacitance; DH-HEMTs; Etching; Frequency; Gallium arsenide; Heterojunction bipolar transistors; Indium gallium arsenide; Indium phosphide; Notice of Violation; Silicon compounds;
Journal_Title :
Electron Devices, IEEE Transactions on
DOI :
10.1109/TED.2002.1003754
