Yan Shengmei, Su Wei, Wang Yajun, Chen Zhang. Analysis of high frequency characteristics and structure parameteric optimization for 0.85 THz folded waveguide traveling-wave tube[J]. Infrared and Laser Engineering, 2014, 43(9): 2901-2906.
| Citation:
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Yan Shengmei, Su Wei, Wang Yajun, Chen Zhang. Analysis of high frequency characteristics and structure parameteric optimization for 0.85 THz folded waveguide traveling-wave tube[J]. Infrared and Laser Engineering, 2014, 43(9): 2901-2906.
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Analysis of high frequency characteristics and structure parameteric optimization for 0.85 THz folded waveguide traveling-wave tube
- 1.
Institute of Electronic Engineering,CAEP,Mianyang 621900,China;
- 2.
The Centre of Terahertz Research,CAEP,Mianyang 621900,China
- Received Date: 2014-01-13
- Rev Recd Date:
2014-02-23
- Publish Date:
2014-09-25
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Abstract
The folded waveguide structure which has enormous advantages can been applied into THz TWT. In the article, a simple theory and equivalent circuit theory were used to analyze high frequency performance of 0.85 THz FW -TWT, and the CST MWS and HFSS codes validate these equivalent theories. The results of simulation and theoretical calculation were coincident. Because FW is a special slow-wave structure, the highest DC voltage was got. In deviation of fabrication dimensions, optimization structure parameters which make 0.85 THz FW-TWT to have wide band and high impedance were got. The results show the limited DC voltage is 26 kV and r0/a(r0represents beam hole radius and a is the width of FW) is about 0.1. The largest cold band width is about 400 GHz and the band width in flat dispersion region is about 275 GHz (825-1 100 GHz) and the change between the lowest and the highest phase velocity is below 1%. The design approach can been used to guide the design of slow-wave structure of THz FW-TWT.
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