Analysis of Dielectric Loss in a Helix Slow-wave Structure

作者：Datta S K^*; Kumar Lalit; Basu B N

来源：Defence Science Journal, 2009, 59(5): 549-552.

DOI：10.14429/dsj.59.1558

• Circuit attenuation
• circuit RF loss
• dielectric attenuation
• dielectric loss
• equivalent circuit analysis
• helix slow-wave structure
• SWS
• helix travelling-wave tube
• TWT

Equivalent circuit analysis of a helix slow-wave structure was carried out and closed form expressions were derived for the shunt capacitance and shunt conductance per unit length of the transmission-line equivalent circuit of the structure. These equivalent circuit parameters were interpreted for the dielectric attenuation constant of the slow-wave structure. The analysis was computationally simple and showsed excellent agreement with published results. The analysis was furthered for predicting the dielectric loss in typical C-Ku band and Ka band helical slow-wave structures, and variation of dielectric loss with temperature.

• 出版日期2009-9