Equivalent Circuit Analysis of Serpentine Folded-waveguide Slow-wave Structures for Millimeter-wave Traveling-wave Tubes

Sumathy, M and Vinoy, KJ and Datta, SK (2009) Equivalent Circuit Analysis of Serpentine Folded-waveguide Slow-wave Structures for Millimeter-wave Traveling-wave Tubes. In: International Journal of Infrared and Millimeter Waves, 30 (2). pp. 151-158.

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Abstract

A simple equivalent circuit model for the analysis of dispersion and interaction impedance characteristics of serpentine folded-waveguide slow-wave structure was developed by considering the straight and curved portions of structure supporting the dominant TE10-mode of the rectangular waveguide. Expressions for the lumped capacitance and inductance per period of the slow-wave structure were derived in terms of the physical dimensions of the structure, incorporating the effects of the beam-hole in the lumped parameters. The lumped parameters were subsequently interpreted for obtaining the dispersion and interaction impedance characteristics of the structure. The analysis was simple yet accurate in predicting the dispersion and interaction impedance behaviour at millimeter-wave frequencies. The analysis was benchmarked against measurement as well as with 3D electromagnetic modeling using MAFIA for two typical slow-wave structures (one at the Ka-band and the other at the W-band) and close agreement observed.

Item Type:	Journal Article
Publication:	International Journal of Infrared and Millimeter Waves
Publisher:	Springer
Additional Information:	Copyright of this article belongs to Springer.
Keywords:	Equivalent circuit analysis;Serpentine folded-waveguide (SFW);Slow-wave structure (SWS);Traveling-wave tube (TWT)
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	01 May 2009 03:36
Last Modified:	19 Sep 2010 05:29
URI:	http://eprints.iisc.ac.in/id/eprint/19646

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