Asian Journal of Physics Vol 32, Nos 9 – 12 (2023) 425-433

Determination of design parameters of SDV-SWS for a planar high power THz-BWO

Vishnu Srivastava
Ex Scientist, Microwave Tubes Division, CSIR-Central Electronics Engineering Research Institute, Pilani-333 031, (Rajasthan), India

Dedicated to Prof B N Basu

Compact, high power, and efficient, planar THz Backward Wave Oscillators (THz-BWOs) with single sheet electron beam and multiple sheet electron beams are investigated. Staggered double-vane loaded rectangular waveguide slow-wave structure (SDV-SWS) is selected for a compact, planar THz-BWO due to its inherent compatibility for sheet beam operation and having high interaction impedance, low circuit loss and large bandwidth. Also, it is easier to fabricate the SDV-SWS by MEMS technology with high precision and surface finish. The structure can also be easily modified by selecting higher-order mode for operation using two or more sheet beams. Simplified analytical approach is presented for determining initial design parameters of SDV-SWS for a high power planar THz-BWO with single sheet beam and multiple sheet beams. The determined initial design parameters of SDV-SWS for planar THz BWOs are found to be in good agreement with the published results that were confirmed using the 3D electromagnetic simulation code CST. © Anita Publications. All rights reserved.
Keywords: THz sources, THz BWO, THz Microscopy, Spectroscopy, Imaging, Radar, Plasma diagnostic.

Peer Review Information
Method: Single- anonymous; Screened for Plagiarism? Yes
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