期刊
JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES
卷 30, 期 3, 页码 211-216出版社
SPRINGER
DOI: 10.1007/s10762-008-9450-x
关键词
Dispersion; Interaction impedance; Helix slow-wave structure (SWS); Traveling wave tube (TWT); Tip loss
资金
- ISRO, Bangalore
This paper describes the analysis of helix slow-wave structure (SWS) for a high efficiency space traveling wave tube that is carried out using Ansoft HFSS and CST microwave studio, which is a 3D electromagnetic field simulators. Two approaches of simulating the dispersion and impedance characteristics of the helix slow wave structure have been discussed and compared with measured results. The dispersion characteristic gives the information about axial propagation constant (Beta). Which in turn yields the phase velocity at a particular frequency. The dispersion and impedance characteristics can be used in finding the pertinent design parameters of the helix slow-wave structure. Therefore a new trend has been initiated at CEERI to use Ansoft HFSS code to analysis of the helix slow wave structure in its real environment. The analysis of the helix SWS for Ku-band 140W space TWT has been carried out and compared with experimental results, and found is close agreement.
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