Complex waves on shielded lossless rectangular dielectric image guide

Crombach, Ulrich

doi:10.1049/el:19830378

Cited by 30 publications

(5 citation statements)

References 2 publications

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“…This characteristic is seen in Figure 4. This is a different case from classical closed waveguide structures in which the complex wave modes appear in an adjacent frequency region of backward wave modes in the phase constant region as given in [21][22][23][24][25][26][27][28][29][30][31].…”

Section: Numerical Resultsmentioning

confidence: 99%

“…This was shown in the dielectric loaded cylindrical waveguide [21,22], the twolayer circular shielded waveguides with different permittivity or permeability [23], the shielded rectangular dielectric image [24,25] and the rod waveguides [26], the planar transmission lines [27], the shielded suspended coupled microstrip line [28], the nonreciprocal finline [29], the suspended ferrite loaded strip lines [30], and the multilayered parallel plate waveguide with ferrite layers [31]. Some studies purpose to give a theoretical proof of the existence of complex wave modes [32] or the co-existence of complex and backward wave modes [19,33] for different waveguide structures.…”

Section: Introductionmentioning

confidence: 92%

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Complex Surface Wave Modes of Plasma Column Loaded Closed Cylindrical Waveguide

Kelebekler

2013

PIER B

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Abstract-The complex dispersion characteristics of the surface wave modes of plasma column loaded closed cylindrical waveguides have been investigated. The numerical results for partially or fully plasma loaded waveguides have been obtained from the Method of Moment (MOM), the exact dispersion equation and the quasistatic dispersion equation. A numerical technique based on the solution of the MoM has been proposed in order to obtain the complex propagation constant from the exact solution. The surface wave modes obtained from these methods have been presented comparatively in the figures. Thus, the insufficiency of the quasistatic approximation to obtain the complex surface wave modes has been shown. Additionally, the study involves a comprehensive literature review including physical descriptions and/or behavior in different physical media of surface wave modes and complex wave modes.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

Complex Surface Wave Modes of Plasma Column Loaded Closed Cylindrical Waveguide

Kelebekler

2013

PIER B

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“…Although the total power carried by each pair of complex modes is zero, they must be included in a rigorous modal analysis. It is reported that ignoring complex modes results in violation of complex power conservation at discontinuities [9]- [11]. Fig.…”

Section: A Determining β: Complex Modesmentioning

confidence: 98%

“…(9) and (10) obviously demonstrate that the elements of [P ] and [Q] matrices are amplitudes of the space harmonics of field components. On the other hand, β in (13) is related to the spatial x-variation of the field components, i. e., for each β n calculated from (14) and (15), there is a spatial distribution for electric field component E yn , that is…”

Section: B Determining [P ] and [Q]mentioning

confidence: 99%

Plane-wave diffraction at a grating composed of left-handed materials

Vahidpour

Shahabadi²

2005

2005 European Microwave Conference

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Binary gratings made of left-handed materials may be considered as novel tools for optical signal processing. In this work, their diffraction properties have been investigated with the help of a semi-analytical numerical method. The method uses an equivalent transmission-line formulation of Maxwell's equations for periodic structures. Being fully vectorial, the formulation can accommodate for negative permittivity and permeability. Using it, one can exploit the circuit theory of transmission lines to develop an absolutely convergent computational method of analysis for periodic structures composed of left-handed materials. In such structures, complex modes have been observed.

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“…. The forbidden band includes the region where complex modes are present (these modes do not carry net power [8], [22]- [24]), plus an additional region where , , and (between 1.61 GHz and 1.93 GHz) in which the modes are evanescent. As pointed out in [24], the pair of complex modes also inhibits signal propagation since such modes co-exist and have contra directional phase.…”

Section: A Inter-resonator Couplingmentioning

confidence: 99%

Common-Mode Suppression in Microstrip Differential Lines by Means of Complementary Split Ring Resonators: Theory and Applications

Naqui

Fernández‐Prieto

Durán‐Sindreu

et al. 2012

IEEE Trans. Microwave Theory Techn.

145

111

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This paper is focused on the application of complementary split-ring resonators (CSRRs) to the suppression of the common (even) mode in microstrip differential transmission lines. By periodically and symmetrically etching CSRRs in the ground plane of microstrip differential lines, the common mode can be efficiently suppressed over a wide band whereas the differential signals are not affected. Throughout the paper, we present and discuss the principle for the selective common-mode suppression, the circuit model of the structure (including the models under even-and odd-mode excitation), the strategies for bandwidth enhancement of the rejected common mode, and a methodology for common-mode filter design. On the basis of the dispersion relation for the common mode, it is shown that the maximum achievable rejection bandwidth can be estimated. Finally, theory is validated by designing and measuring a differential line and a balanced bandpass filter with common-mode suppression, where double-slit CSRRs (DS-CSRRs) are used in order to enhance the common-mode rejection bandwidth. Due to the presence of DS-CSRRs, the balanced filter exhibits more than 40 dB of common-mode rejection within a 34% bandwidth around the filter pass band.

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Complex waves on shielded lossless rectangular dielectric image guide

Cited by 30 publications

References 2 publications

Complex Surface Wave Modes of Plasma Column Loaded Closed Cylindrical Waveguide

Complex Surface Wave Modes of Plasma Column Loaded Closed Cylindrical Waveguide

Plane-wave diffraction at a grating composed of left-handed materials

Common-Mode Suppression in Microstrip Differential Lines by Means of Complementary Split Ring Resonators: Theory and Applications

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