Title :
A novel omega-shaped microstrip slow-wave structure for 60-GHz traveling-wave tube
Author :
Lei Liao ; Yanyu Wei ; Luwei Lu ; Linna Yue ; Tao Tang ; Wenxiang Wang ; Yubin Gong
Author_Institution :
Nat. Key Lab. of Sci. & Technol. on Vacuum Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this paper, a novel microstrip meander-line slow-wave structure (SWS) is proposed for using in V-band traveling-wave tube (TWT). The new omega-shaped microstrip meander-line slow-wave structure has higher interaction impedance by contrasting analysis of the conventional U-shaped microstrip meander-line SWS. The transmission characteristics, dispersion characteristic, coupling impedance and beam-wave interaction are simulated by utilizing the simulation software HFSS and CST. The calculation of beam-wave interaction indicated that, at a beam current of 0.1 A and a beam voltage of 7.1 kV, the new microstrip meander-line SWS is capable of delivering more than 28.5 W output power. And its interaction efficiency reaches 12.3% with a transient 3dB bandwidth of 5 GHz (ranging 57.5 GHz to 62.5 GHz).
Keywords :
coupled circuits; microstrip lines; millimetre wave couplers; slow wave structures; CST simulation software; HFSS simulation software; SWS; TWT; U-shaped microstrip meander-line; V-band; bandwidth 5 GHz; beam wave interaction; beam-wave interaction; coupling impedance; dispersion characteristic; frequency 57.5 GHz to 62.5 GHz; meander-line slow-wave structure; omega-shaped microstrip slow-wave structure; transmission characteristics; traveling-wave tube; voltage 7.1 kV; Distance measurement; Educational institutions; Electron tubes; Impedance; Indexes; Laboratories; Microstrip; Microstrip meander-line slow-wave structure; beam-wave interaction; coupling impedance; dispersion characteristic;
Conference_Titel :
Microwave and Millimeter Wave Circuits and System Technology (MMWCST), 2013 International Workshop on
Conference_Location :
Chengdu
DOI :
10.1109/MMWCST.2013.6814644
