Title :
Design of a high efficiency C-band 60 W space TWT
Author :
Srivastava, V. ; Ravinder, B. ; Ghosh, TK ; Choudhuri, D. ; Sinha, AK ; Raju, R.S. ; Joshi, SN
Author_Institution :
Central Electron. Eng. Res. Inst., Pilani, India
Abstract :
Design of a high efficiency C-band 60 W space TWT is presented. In-house developed software packages are used for the design of: (i) electron gun, (ii) PPM focusing system, (iii) helix slow wave structure (SWS), (iv) input and output couplers, (v) Beam-Refocusing Section (BRS), and (vi) Multi-stage Depressed Collector (MDC). Results are presented for the low-convergence electron gun with space-charge balanced flow; helix SWS with sever and double-velocity taper for high interaction efficiency; BRS for improving collector efficiency; and 4-stage depressed collector. The design is optimised at beam voltage 3.0 kV and beam current 75 mA. Computed electronic efficiency is achieved better than 32% and overall efficiency better than 55%
Keywords :
CAD; electrical engineering computing; electron beam focusing; electron guns; microwave tubes; slow wave structures; travelling wave tubes; 3 kV; 32 percent; 55 percent; 60 W; 75 mA; PPM focusing system; beam-refocussing section; double-velocity taper; electron gun; helix slow wave structure; high efficiency C-band TWT; input coupler; low-convergence electron gun; multi-stage depressed collector; output coupler; software packages; space TWT; space-charge balanced flow; Assembly; Couplers; Design optimization; Electrodes; Electron beams; Electron tubes; Frequency; Magnetic analysis; Magnetic fields; Voltage;
Conference_Titel :
Microwave and Millimeter Wave Technology Proceedings, 1998. ICMMT '98. 1998 International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-4308-5
DOI :
10.1109/ICMMT.1998.768402
