He Jun et al 2009 Chinese Phys. Lett. 26 114103 doi:10.1088/0256-307X/26/11/114103
He Jun, Wei Yan-Yu, Gong Yu-Bin and Wang Wen-Xiang
Show affiliationsA novel slow-wave structure (SWS), the folded double-ridged waveguide structure, is presented and its linear gain properties are investigated. The perturbed dispersion equation is derived and the small signal growth rate is calculated for dimensions of the ridge-loaded region and the parameters of the electron beam. The novel structure has potential applications in the production of high power and broad band radiation. For a cold beam, the linear theory predicts a gain of 1.1–1.27 dB/period and a 3-dB small-signal gain bandwidth of 30% in W-band. A comparison between the folded double-ridged waveguide SWS and folded waveguide SWS (FWSWS) shows that with the same physical parameters, the novel SWS has an advantage over the FWSWS on the bandwidth and electron efficiency.
84.40.Fe Microwave tubes (e.g., klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.)
Issue 11 (November 2009)
Received 22 June 2009
He Jun et al 2009 Chinese Phys. Lett. 26 114103
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