Title :
Design and investigation of high-power helix TWT for systems of distant and space communication
Author :
Grekov, A.I. ; Krutchkov, V.V. ; Ruvinskiy, G.V. ; Tishina, V.S.
Author_Institution :
SPRC, Fryazino, Russia
Abstract :
The application in output cascades of multichannel high-power transmitters of wideband vacuum devices, which are capable to work at several frequencies simultaneously, is an actual problem. The multifrequency modes were investigated in high-power helical TWT, having the band of amplified frequencies more than 40% and working without regulation of applied voltage in all operating frequency range. The third-order elements of the intermodulation products (3rd IMPE) were investigated by operation in a multifrequency mode at different levels of the output signal. For the purpose of getting a regular amplitude-frequency characteristic (AFC) and damping of self-excitation in a working mode, we used different parameters of the helix for the different parts of a slow-wave system (SWS) and optimum location of additional local attenuators
Keywords :
intermodulation; radio transmitters; slow wave structures; space communication links; travelling wave tubes; amplitude-frequency characteristics; high-power helix TWT; multichannel high-power transmitter; multifrequency mode; self-excitation damping; slow-wave structure; space communication; third-order intermodulation product; wideband vacuum device; Attenuators; Automatic frequency control; Cathodes; Cooling; Damping; Performance gain; Power generation; Power system harmonics; Transmitters; Voltage;
Conference_Titel :
Electronics and Radiophysics of Ultra-High Frequencies, 1999. International University Conference Proceedings
Conference_Location :
St Petersburg
Print_ISBN :
5-7422-0083-8
DOI :
10.1109/UHF.1999.787874