Title :
Experiment on TWT 3IM suppression using harmonic and IM3 injection
Author :
Li, Li ; Feng, Jinjun ; Cai, Shaolun ; Liang, Xiaofeng
Author_Institution :
Vacuum Electron. Nat. Lab., Beijing
Abstract :
In this paper, both second harmonic and third order inter-modulation signals are experimentally injected into a traveling wave tube (TWT) to carry out the research on the suppression of IM3 in a X-band TWT. The results shows that with proper phase and amplitude of injected 2f2 and 2f2 - f1, a significant reduction in the upper IM3 (2f2 - f1) is observed. IM3 suppression of up to 30.67 dB is examined with 2f2 injection when Df = f1- f2 = 5MHz, and 15.75 dB IM3 suppression is obtained with IM3 (2f2 - f1) injection.
Keywords :
intermodulation distortion; travelling wave tubes; 3IM suppression; IM3 injection; X-band; intermodulation signal suppression; second harmonic signal; third order inter-modulation signal; traveling wave tube; Frequency; Harmonic analysis; Laboratories; Phase shifters; Physics; Plasma waves; Power generation; Power system harmonics; Signal analysis; Spectral analysis;
Conference_Titel :
Vacuum Electronics Conference, 2008. IVEC 2008. IEEE International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4244-1715-5
DOI :
10.1109/IVELEC.2008.4556474
