Title :
Novel Folded Frame Slow-Wave Structure for Millimeter-Wave Traveling-Wave Tube
Author :
Guo Guo ; Yanyu Wei ; Minghao Zhang ; Travish, Gil ; Lingna Yue ; Jin Xu ; Hairong Yin ; Minzhi Huang ; Yubin Gong ; Wenxiang Wang
Author_Institution :
Nat. Key Lab. of Sci. & Technol. on Vacuum Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
A new type of folded frame slow-wave structure (SWS) is introduced and used in the design of a low-voltage, high-efficiency, and widebandwidth millimeter-wave traveling-wave tube (TWT). The high-frequency characteristics of the folded frame structure, including dispersion properties, coupling impedances, and reflection characteristics are investigated. The beam-wave interaction of the TWT with the folded frame SWS working at the millimeter-wave frequency range is also calculated using 3-D particle-in-cell algorithms. The simulation results reveal that with sheet electron beam parameters of 6000 V and 0.2 A, the average output power and electron efficiency can reach 196 W and 16.3%, respectively. Compared with the symmetric double V-shaped microstrip meander-line SWS, the folded frame SWS has larger coupling impedances and can generate higher output power.
Keywords :
millimetre wave tubes; slow wave structures; 3-D particle-in-cell algorithms; beam-wave interaction; coupling impedances; current 0.2 A; dispersion properties; efficiency 16.3 percent; electron efficiency; folded frame slow-wave structure; high-frequency characteristics; millimeter-wave frequency range; millimeter-wave traveling-wave tube; output power; power 196 W; reflection characteristics; sheet electron beam parameters; voltage 6000 V; Bandwidth; Couplings; Dispersion; Electron beams; Impedance; Microstrip; Power generation; Beam-wave interaction; folded frame; high-frequency characteristics; sheet electron beam; slow-wave structure (SWS);
Journal_Title :
Electron Devices, IEEE Transactions on
DOI :
10.1109/TED.2013.2280426
