Accurate Parametric Modeling of Folded Waveguide Circuits for Millimeter-Wave Traveling Wave Tubes

Booske, John H.; Converse, M.C.; Kory, C.L.; Chevalier, Christine T.; Gallagher, D.; Kreischer, K.E.; Heinen, Vernon O.; Bhattacharjee, Sudeep

doi:10.1109/ted.2005.845798

Cited by 184 publications

(63 citation statements)

References 12 publications

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“…The dispersion and interaction impedance characteristics of these structures were evaluated using present approach and compared to those from 3D electromagnetic modeling in MAFIA. The 3D electromagnetic modeling in MAFIA was carried out following eigen-mode analysis for a 2-period structure having periodic boundaries and the dispersion and interaction impedance values at the eigen-frequencies were computed following the approach of Booske et al [10]. The Ka-band structure was further benchmarked against measurement.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, we treated the aperture as a stub at the broad-wall [10,12], and the corresponding lumped circuit parameters for the apertures are expressed as:…”

Section: Discussionmentioning

confidence: 99%

“…Here, Y 0 is the wave-admittance of the rectangular waveguide, λ g is the guide wavelength, and M (¼ r 3 c 6) is an empirical factor [10,12]. With this correction, the total lumped circuit inductance and capacitance for a period of the rectangular folded-waveguide slow-wave structure are given as:…”

Section: Discussionmentioning

confidence: 99%

“…The W-plane values are used for calculating the capacitance and inductance of the structure. Finally, the effects of the presence of beam hole are included in the lumped circuit parameters following the approach of Booske et al [10] as used for serpentine folded-waveguide slow-wave structures. The lumped parameters were subsequently interpreted to obtain the dispersion and interaction impedance characteristics of the structure.…”

mentioning

confidence: 99%

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Analysis of Rectangular Folded-Waveguide Millimeter-Wave Slow-wave Structures using Conformal Transformations

Sumathy

Vinoy

Datta

2008

J Infrared Milli Terahz Waves

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An analysis of rectangular folded-waveguide slow-wave structure was developed using conformal mapping technique through Schwarz's polygon transformation and closed form 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 benchmarked for two typical millimeter-wave structures, one operating in Ka-band and the other operating in Q-band, against measurement and 3D electromagnetic modeling using MAFIA.

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Section: Resultsmentioning

confidence: 99%

“…Thus, we treated the aperture as a stub at the broad-wall [10,12], and the corresponding lumped circuit parameters for the apertures are expressed as:…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Analysis of Rectangular Folded-Waveguide Millimeter-Wave Slow-wave Structures using Conformal Transformations

Sumathy

Vinoy

Datta

2008

J Infrared Milli Terahz Waves

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“…The high-frequency properties of the slotted helix SWS are calculated by the eigenmode solver with master and slave boundary condition [39] in the 3-D electromagnetic simulation software Ansoft HFSS [26]. The optimized dimensional parameter values of the slotted helix SWS are presented in Table 1.…”

Section: Electromagnetic Propertiesmentioning

confidence: 99%

A Novel Slotted Helix Slow-Wave Structure for Millimeter-Wave Traveling-Wave Tube

Liu¹,

Wei²,

Xu³

et al. 2013

PIER

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Abstract-A novel slotted helix slow-wave structure (SWS) is proposed to develop high power, wide-bandwidth, high reliability millimeter-wave traveling-wave tube (TWT). This structure, which can improve the heat dissipation capability of the helix SWS, evolves from conventional helix SWS with three parallel rows of rectangular slots made in the outside of the helix. In this paper, thermal stress analysis, the electromagnetic characteristics and the beam-wave interaction of this structure are investigated. The conclusions of this paper will be a great help for the design of millimeter-wave traveling-wave tube.

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

Sumathy

Vinoy

Datta

2008

J Infrared Milli Terahz Waves

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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 TE 10 -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.

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Accurate Parametric Modeling of Folded Waveguide Circuits for Millimeter-Wave Traveling Wave Tubes

Cited by 184 publications

References 12 publications

Analysis of Rectangular Folded-Waveguide Millimeter-Wave Slow-wave Structures using Conformal Transformations

Analysis of Rectangular Folded-Waveguide Millimeter-Wave Slow-wave Structures using Conformal Transformations

A Novel Slotted Helix Slow-Wave Structure for Millimeter-Wave Traveling-Wave Tube

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

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