εr=1, the dispersion relation can be simplified with a closed form of the conventional Pierce’s small-signal equation, which confirms the validity of the derivations. By giving the specific parameters, the effects of dielectric loading on the small-signal gain have been studied. The results indicated that in the case of "weak loading" (where d/a<0.1), the gain is flattened and there is no need to readjust the structure parameters beyond a slight adjustment of beam parameters. By considering that the "weak loading" can reduce the ohmic loss of the conductor, this study will be also a guide to the research of the THz folded waveguide traveling-wave tube."/>     Linear analysis of the dielectric-loaded folded waveguide traveling-wave tube amplifier
Acta Physica Sinica
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Acta Phys. Sin.  2010, Vol. 59 Issue (9): 6653-6658    
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Current Issue| Next Issue| Archive| Adv Search  |   
Linear analysis of the dielectric-loaded folded waveguide traveling-wave tube amplifier
Zhang Chang-Qing, Gong Yu-Bin, Wei Yan-Yu, Wang Wen-Xiang
National Key Laboratory of High Power Vacuum Electronics, School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
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