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Metamaterials in particular a kind of metallic complementary electric split ring resonator (CeSRRs) bring new opportunities for traditional high-power vacuum electric devices. In this paper, we report the transmission characteristics in both simulation and experiment for a novel slow-wave structure (SWS) with the CeSRRs and then study the beam-wave interaction by using the PIC simulation. It is shown...
Slow wave structure employed in a wide-band helix traveling wave tube (TWT) always support backward waves. A backward wave space harmonic of a signal at a harmonic of the drive signal can effectively interact with slow space-charge wave of an electron beam. The minus first space harmonic is in synchronism with the beam at some frequencies. As a consequence, the backward wave can compete with the forward...
Slow wave structures used in forward wave amplifiers like wide-band helix traveling wave tube (TWT) always support backward waves. A backward wave can interact with an electron beam and compete with the forward wave, and then the power holes occur under large signal conditions. The power holes have serious consequences for the TWT performances, especially for communication applications. In this paper,...
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