Analysis of Ridge-Loaded Folded-Waveguide Slow-Wave Structures for Broadband Traveling-Wave Tubes

Author

Sumathy, M. ; Vinoy, K.J. ; Datta, S.K.

Author_Institution

Microwave Tube R&D Centre, Defence R&D Organ., Bangalore, India

Volume

57

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1440

Lastpage

1446

Abstract

An E-plane serpentine folded-waveguide slow-wave structure with ridge loading on one of its broad walls is proposed for broadband traveling-wave tubes (TWTs) and studied using a simple quasi-transverse-electromagnetic analysis for the dispersion and interaction impedance characteristics, including the effects of the beam-hole discontinuity. The results are validated against cold test measurements, an approximate transmission-line parametric analysis, an equivalent circuit analysis, and 3-D electromagnetic modeling using CST Microwave Studio. The effect of the structure parameters on widening the bandwidth of a TWT is also studied.

Keywords

equivalent circuits; ridge waveguides; slow wave structures; transmission lines; 3D electromagnetic modeling; CST Microwave Studio; approximate transmission-line parametric analysis; beam-hole discontinuity effect; broadband traveling-wave tubes; cold test measurements; dispersion impedance characteristics; e-plane serpentine folded-waveguide slow-wave structure; equivalent circuit analysis; interaction impedance characteristics; quasi-transverse-electromagnetic analysis; ridge-loaded folded-waveguide slow-wave structure analysis; Circuit analysis; Circuit testing; Dispersion; Electromagnetic analysis; Electromagnetic measurements; Electromagnetic modeling; Equivalent circuits; Impedance; Microwave measurements; Transmission lines; Broadbanding; equivalent circuit analysis; folded-waveguide slow-wave structure (SWS); quasi-transverse-electromagnetic (quasi-TEM) analysis; ridge loading;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/TED.2010.2045680

Filename

5447661