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Improved Corrugation Cross-Sectional Shape in Terahertz Double Corrugated Waveguide

Research output: Contribution to journalJournal article


Journal publication date11/2012
JournalIEEE Transactions on Electron Devices
Number of pages4
Pages3116 -3119
Early online date5/10/12
Original languageEnglish


The double corrugated waveguide, with square cross-sectional corrugations, was demonstrated as an effective slow-wave structure for terahertz vacuum electron devices. The moderate losses and the good interaction impedance, in both the forward- and backward-wave regimes, enable the design of tubes at terahertz frequencies. However, significant performance improvements would derive from a further reduction of losses and an increase of the interaction impedance. Different new cross-sectional shapes of the corrugations in the double corrugated waveguide are proposed to reduce the losses and improve the interaction impedance. A relevant improvement of the tube performance in both the forward- and backward-wave regimes is obtained by using the proposed new improved cross-sectional shapes.