Title :
Sine Waveguide for 0.22-THz Traveling-Wave Tube
Author :
Xu, Xiong ; Wei, Yanyu ; Shen, Fei ; Duan, Zhaoyun ; Gong, Yubin ; Yin, Hairong ; Wang, Wenxiang
Author_Institution :
Vacuum Electron. Nat. Lab., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
A novel slow-wave structure called sine waveguide has been proposed to develop a wideband high-power terahertz radiation source. The sine waveguide evolves from a rectangular waveguide oscillating with sinusoid along its longitudinal direction. This letter reports the electromagnetic characteristics of the sine waveguide and its effective surface plasmon amplification mechanism. From our calculation, this circuit structure possesses low ohmic losses and reflection and can be applied to produce terahertz waves ranging from 0.2 to 0.25 THz with several hundreds of watts. Moreover, the maximum gain and interaction efficiency may reach 37.7 dB and 9.6%, respectively.
Keywords :
millimetre wave devices; rectangular waveguides; slow wave structures; surface plasmons; efficiency 9.6 percent; electromagnetic characteristics; frequency 0.2 THz to 0.25 THz; gain 37.7 dB; high-power terahertz radiation source; rectangular waveguide; sine waveguide; slow-wave structure; surface plasmon amplification mechanism; traveling-wave tube; Electron beams; Electron tubes; Integrated circuit modeling; Plasmons; Rectangular waveguides; Surface waves; Sheet electron beam; sine waveguide; terahertz; traveling-wave tube (TWT);
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2011.2158060
