Title: Design of RF planar slow wave interaction structure for THz devices

Authors: K. Kishore Kumar; Movva Pavani

Addresses: Department of Electronics and Communication Engineering (ECE), Faculty of Science and Technology, IFHE, Hyderabad, India ' Department of Electronics and Communication Engineering (ECE), Faculty of Science and Technology, IFHE, Hyderabad, India

Abstract: Micro fabricated planar slow wave structure (SWS) in a travelling wave tube (TWT) has shown a superior performance when compared with the circular helix structure for RF power amplification. The circular helix structure applications are limited to the maximum operating frequency of 70 GHz. In the proposed paper, a rectangular planar slow wave structure operating at terahertz (THz) is designed. Fabrication of the beam interaction system is complex especially operating at higher frequencies as the device dimensions decrease. Use of planar interaction system simplifies the miniaturised fabrication process. The present paper focused on the design of staggered double vane slow wave structure (SWS) and simulated the corresponding dispersion diagram and S-parameters of the model by using CST Studio Suite software. The results for designed RF planar slow wave structure are then analysed.

Keywords: slow wave structure; SWS; travelling wave tube; TWT; waveguide; eigenmode analysis; transient analysis; rectangular waveguide cutoff frequency.

DOI: 10.1504/IJCAET.2021.115947

International Journal of Computer Aided Engineering and Technology, 2021 Vol.15 No.1, pp.58 - 66

Received: 05 Nov 2018
Accepted: 21 Dec 2018
Published online: 06 Jul 2021 *

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