DocumentCode :
52188
Title :
A Novel Ridge-Vane-Loaded Folded-Waveguide Slow-Wave Structure for 0.22-THz Traveling-Wave Tube
Author :
Yan Hou ; Yubin Gong ; Jin Xu ; Shaomeng Wang ; Yanyu Wei ; Lingna Yue ; Jinjun Feng
Author_Institution :
Nat. Key Lab. of Sci. & Technol. on Vacuum Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Volume :
60
Issue :
3
fYear :
2013
fDate :
Mar-13
Firstpage :
1228
Lastpage :
1235
Abstract :
A novel slow-wave structure called ridge-vane-loaded folded waveguide combined with pencil electron beam has been proposed for millimeter-wave traveling-wave tubes. The high-frequency characteristics including the dispersion properties and the interaction impedance of this kind of structure have been analyzed by means of an equivalent circuit based on the transmission-line cascading network. The theoretical results agree well with those obtained by the 3-D electromagnetic high-frequency simulation software. The nonlinear interaction between the electron beam and the electromagnetic field is investigated with the help of the Computer Simulation Technology Particle Studio 3-D particle-in-cell (PIC) code. The PIC simulation results revealed that this kind of structure could produce about 56 W of peak output power at 0.22-THz when the cathode voltage and current of the pencil electron beam are set to 14.65 kV and 50 mA, respectively. Moreover, the maximum gain and interaction efficiency can reach 37.5 dB and 7.7% at 0.22 THz, respectively. A simulated 3-dB bandwidth of ~ 30 GHz is demonstrated.
Keywords :
equivalent circuits; millimetre wave tubes; ridge waveguides; slow wave structures; 3D electromagnetic high-frequency simulation software; Computer Simulation Technology Particle Studio 3D PIC code; Computer Simulation Technology Particle Studio 3D particle-in-cell code; PIC simulation; current 50 mA; dispersion properties; efficiency 7.7 percent; electromagnetic field; equivalent circuit; frequency 0.22 THz; gain 37.5 dB; high-frequency characteristics; interaction efficiency; interaction impedance; millimeter-wave traveling wave tubes; nonlinear interaction; pencil electron beam; ridge-vane-loaded folded-waveguide; slow-wave structure; transmission-line cascading network; voltage 14.65 kV; Dispersion; Electron tubes; Impedance; Rectangular waveguides; Transmission line matrix methods; Waveguide junctions; Equivalent circuit; ridge-vane-loaded folded waveguide (RVL-FWG); slow-wave structure (SWS); terahertz; traveling-wave tube (TWT);
fLanguage :
English
Journal_Title :
Electron Devices, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9383
Type :
jour
DOI :
10.1109/TED.2013.2238941
Filename :
6459573
Link To Document :
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