Design of W-band sheet beam Extended Interaction Klystron for millimeter-wave appplications
In this paper, the design of sheet-beam Extended Interaction Klystron (SBEIK) is discussed. The SBEIK is initially designed by implementing the preliminary equations and then modelled using CST-Microwave Studio (MWS) to obtain the dispersion characteristics by the Eigen-mode solver. The coupler design is carried out with stepped impedance transformer approach and is optimised to get a return loss of −54 dB. Particle-in-cell (PIC) simulation is carried out in CST-PIC solver indicated an RF output power of 7 kW and a gain of 28.4 dB.
Microfabricated Terahertz Vacuum Electron Devices: Technology, Capabilities and Performance Overview
Recent technological innovations in electronics and photonics are now enabling THz research to be real iz d in defence as well as civil sectors. Undoubtedly, micr ofabricated vacuum electron devices (MVEDs) are cap able to fulfil the source requirement. In last couple of ye ars, development of high definition electromagnetic simulation codes, advancement in micro-&-nano fabrication and further characterization techniques, development of high current density hot (thermionic) and cold (CNT and FEA) emitters, and progress in ultra-high vacuum wi ndow research have been the driving force behind the ext raordinary development in MVEDs. In this article, t he importance of THz region and need of THz MVEDs are pr sented. Furthermore, fabrication approaches of promising planar microfabrication compatible slow-w ave structures, high current density electron beam generation for THz MVEDs have been reviewed. Finall y, state-of-the art THz MVEDs and future trends are discussed.
EXTENDED INTERACTION KLYSTRON TECHNOLOGY AT MILLIMETER AND SUBMILLIMETER WAVELENGTHS
This paper reviews the technology and demonstrated capability of mmW and Sub-mmW Extended Interaction Klystrons at CPI Canada. It discusses design and manufacturing concepts stating self-imposed restrictions and design modifications enhancing power capability, bandwidth and extending operating frequency into the THz region.