Radial Multigap Resonant Cavity for W-Band High Power EIK

A novel angular radial multigap resonant cavity (ARMRC) is proposed for W-band high power extended interaction klystron (EIK). The proposed cavity can operate with an angular radial sheet electron beam (ARSEB), which has larger space-charge limited current than conventional sheet electron beam. As a result, the angular radial EIK based on the proposed ARMRC is expected to provide higher output power than the corresponding conventional sheet beam EIK. High frequency characteristics of the proposed ARMRC are investigated here by using simulations. The 2 $\pi -$ mode resonant frequencies of the ARMRC have been obtained for different radii, angular spread, and cavity heights. The study provides guidelines for the design of a high power angular radial EIK at W-band.