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Journal ArticleDOI

Characteristics of inhomogeneously filled double L-septa waveguides

01 Nov 1992-IEEE Transactions on Microwave Theory and Techniques (IEEE)-Vol. 40, Iss: 11, pp 2050-2054
TL;DR: In this article, three types of inhomogeneous double L-septa guide (DLSG) produced by selective dielectric loading of the different regions are analyzed and the cutoff and bandwidth characteristics of these configurations are compared with the inhomogenous T-septpta guide and homogeneous DLSG.
Abstract: Three types of inhomogeneous double L-septa guide (DLSG) produced by selective dielectric loading of the different regions are analyzed. The cutoff and bandwidth characteristics of these configurations are compared with the inhomogeneous T-septa guide and homogeneous DLSG. An optimum configuration with very large bandwidth emerges as a potential structure for practical implementation. >
Citations
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Journal ArticleDOI
TL;DR: In this paper, a new rectangular waveguide with two L-shaped septa has been added to the family of septa-loaded broad-band waveguides, and its modal characteristics and dispersion in the inhomogeneously loaded version have been theoretically determined.
Abstract: A new rectangular waveguide with two L-shaped septa has been added to the family of septa-loaded broad-band waveguides. Its modal characteristics and dispersion in the inhomogeneously loaded version have been theoretically determined. The cutoff frequency and the bandwidth of the lowest TE mode are also compared with the experimentally measured values obtained with a test cavity.

7 citations

Journal ArticleDOI
TL;DR: In this article, the authors proposed an improved version of the double T-septa guide having larger cut-off wavelength and broader bandwidth of the dominant TE mode, which is shown theoretically by the authors to be an improved variant of the Double T-Septa guide with two L-shaped septa attached to the broad walls.
Abstract: Rectangular waveguides with two L-shaped septa attached to the broad walls in antipodal configuration have been shown theoretically by the authors (see ibid. vol.40, no.4, p.777-781, 1992) to be an improved variant of the double T-septa guide having larger cut-off wavelength and broader bandwidth of the dominant TE mode. Numerical data on the attenuation, impedance, and power handling capability of this new type of broadband guide are presented as additional design information. >

2 citations

Journal ArticleDOI
TL;DR: In this paper, the authors deal with a circular double-ridged waveguide (CDRW) as a key element of traveling-wave systems for microwave thermal processing, and derive approximate formulas for estimation of basic characteristics of CDRW partially filled with dielectric.
Abstract: This paper deals with a circular double-ridged waveguide (CDRW) as a key element of traveling-wave systems for microwave thermal processing. Approximate formulas for estimation of basic characteristics of CDRW partially filled with dielectric are derived with the use of the equivalent circuit technique. For accurate analysis, 3D FDTD models are developed and used for computation of coupling, electric field, and dissipated power in a coaxially excited five-section CDRW applicator with three spherical loads. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1708–1713, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22539

1 citations

Journal ArticleDOI
TL;DR: In this article, the effects of the septa dimensions on the DLSG's characteristics are investigated, and numerical data that would be useful for application of the double L-shaped septa has been presented.
Abstract: A rectangular waveguide with a double L-shaped septa has recently been proposed as a broadband transmission medium. The effects of the septa dimensions on its characteristics are investigated in this article. Numerical data that would be useful for application of the DLSG have been presented. © 1995 John Wiley & Sons, Inc.

1 citations

References
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Journal ArticleDOI
TL;DR: In this paper, the complete solution of the ridged waveguide eigenvalue problem is presented by the formulation of an integral eigen value equation which is subsequently solved numerically by application of the Ritz-Galerkin method.
Abstract: The complete solution of the ridged waveguide eigen-value problem is presented. The solution is obtained by the formulation of an integral eigenvalue equation which is subsequently solved numerically by application of the Ritz-Galerkin method. The significance of the eigenvalue spectrum is discussed and the modes are classified as either hybrid or trough modes. Equations are given for the electric and magnetic fields and a brief discussion of the edge singularity is presented. The theory is illustrated by computing the dominant eigenvalues and characteristic impedances of various unsymmetrical ridged waveguides.

177 citations


"Characteristics of inhomogeneously ..." refers methods in this paper

  • ...The next two modes in the spectrum are the cross-polarized trough modes which are similar to the eigenvalue spectra of DRG [ 7 ] DTSG [2], [3], DLSG [l] and IDTSG [5]....

    [...]

Journal ArticleDOI
TL;DR: In this article, numerical data on the cutoff and bandwidth characteristics of the dominant TE/sub 10/ mode of rectangular waveguide with a single T-septum are presented and compared with those of single-ridged guides.
Abstract: Recently, a new rectangular waveguide with two T-shaped septa has heen proposed by the authors as a superior alternative to conventional ridged guide. Here, numerical data on the cutoff and band-width characteristics of the dominant TE/sub 10/ mode of rectangular waveguide with a single T-septum are presented and compared with those of single-ridged guides. The gap impedances of both the double and single T-septum guides are also determined as functions of gap parameters.

29 citations


"Characteristics of inhomogeneously ..." refers methods in this paper

  • ...This Double T-Septa Guide (DLSG) is a variant of the previously reported Double T-Septa Guide (DTSG) which was suggested as a superior alternative to the Double Ridged Guide (DRG) [2], [ 3 ]....

    [...]

  • ...The next two modes in the spectrum are the cross-polarized trough modes which are similar to the eigenvalue spectra of DRG [7] DTSG [2], [ 3 ], DLSG [l] and IDTSG [5]....

    [...]

Journal ArticleDOI
TL;DR: In this article, a new rectangular waveguide with two T-shaped septums in place of solid rectangular ridges has been analyzed theoretically by the Ritz-Galerkin technique and is found to have superior cutoff and bandwidth characteristics of the dominant TE/sub10/ mode compared to the conventional ridged guides.
Abstract: A new rectangular waveguide with two T-shaped septums in place of solid rectangular ridges has been analyzed theoretically by the Ritz-Galerkin technique and is found to have superior cutoff and bandwidth characteristics of the dominant TE/sub10/ mode compared to the conventional ridged guides. Numerical data are presented and compared with those of symmetric double-ridged guides with identical gap parameters.

24 citations

Journal ArticleDOI
TL;DR: In this paper, the dispersion equation of the Teflon-slab-loaded ridged waveguide with inhomogeneous dielectric slab Ioading is derived and the cutoff frequencies of the three lowest order TE/sub m0/ modes are given which substantiate the feasibility of the modal expansion and field matching technique employed.
Abstract: The dispersion equation of the ridged waveguide with inhomogeneous dielectric-slab Ioading is derived. Numerical results for the cutoff frequencies of the three lowest order TE/sub m0/ modes are given which substantiate the feasibility of the modal expansion and field-matching technique employed. For a Teflon-slab loaded ridged waveguide, a 40-percent decrease of dominant-mode cutoff frequency, simultaneously providing 20-percent enhanced TE/sub 20/-mode separation compared to an empty ridged waveguide, is demonstrated.

22 citations

01 Jan 1978
TL;DR: In this paper, the dispemion equation of the ridged waveguide with inho-mogeneous dielectric-slab Ioadmg is derived and numerical results for the cutoff frequencies of the three lowest order TE~O modes are given which substantiate the feasibility of modal expansion and field-ruatcbing technique employed.
Abstract: Tbe dispemion equation of the ridged wavegrdde with inho- mogeneous dielectric-slab Ioadmg is derived. Numerical results for the cutoff frequencies of the three lowest order TE~O modes are given which substantiate the feaaibfity of tbe modal expansion and field-ruatcbing technique employed. For a Teflon-slab 10MW ridged wavegwid~ a 40-per- cent deereaae of dominant-mode cutoff frequency, simuftanemrdy provid- ing 20-percent enhanced ~O-mode separation compared to an empty ridged waveguide, is demonstrated.

21 citations