Quasi-TEM waveguides realized by FSS-walls

Cucini, A.; Caiazzo, M.; Bennati, P.; Maci, S.

doi:10.1109/aps.2004.1329793

Cited by 12 publications

(10 citation statements)

References 4 publications

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“…This structure supports four categories of modes, namely LSE (Longitudinal Section Electric) symmetric, LSE antisymmetric, LSM (Longitudinal Section Magnetic) symmetric, and LSM antisymmetric. It has been discussed in and .…”

Section: Mechanism Analysis Of Amc With Fss Wallsmentioning

confidence: 99%

“…It has been perceived that the AMC in quasi‐TEM waveguide works with the same physical mechanism as well as two‐dimensional periodic structures. At the resonant frequency of the FSS, the side walls behave as high‐impedance surfaces (artificial magnetic conducting), thus supporting the propagation of a quasi‐TEM mode . However, it has already been demonstrated in [I] that the realization of AMC in quasi‐TEM waveguide is not based on the resonant phenomena.…”

Section: Introductionmentioning

confidence: 99%

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Quasi‐TEM Rectangular Waveguides with Frequency Selective Surface Walls: Part II—Physical Mechanism

Mallat

2013

Int J Numerical Modelling

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The physical mechanism of quasi‐TEM (transverse electromagnetic) waveguides with frequency selective surface (FSS) walls is established on the basis of an equivalent magnetic current technique in this paper. The equivalent magnetic current distributions in the slots of dielectric surfaces with dipole‐FSS walls and dielectric surface of bare‐slab, as well as hexagonal crystal FSS walls, are presented and discussed. This study shows that the electromagnetic fields in waveguide are mainly radiated from the concurrent magnetic current bands in longitudinal slots. The relationship between the uniformity of electromagnetic fields and the phase variation of longitudinal magnetic currents is discussed. The electrical properties and mechanism of quasi‐TEM rectangular waveguides with slotlines are also investigated to confirm the proposed mechanism. Three categories of periodic structure, which are potentially useful as artificial magnetic conductor, are investigated, and the required conditions to realize quasi‐TEM mode in rectangular waveguide are proposed. Copyright © 2013 John Wiley & Sons, Ltd.

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Section: Mechanism Analysis Of Amc With Fss Wallsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quasi‐TEM Rectangular Waveguides with Frequency Selective Surface Walls: Part II—Physical Mechanism

Mallat

2013

Int J Numerical Modelling

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“…Figure (a) shows a side‐wall‐slab‐loaded rectangular waveguide with a rectangular grid of metal strips (dipole FSS) printed on the dielectric surfaces. The structure was initially proposed in , and its dispersion properties were investigated in with the method of moments. As indicated in , the surface can be classified into four categories, namely, longitudinal section electric (LSE) symmetric, LSE antisymmetric, longitudinal section magnetic (LSM) symmetric, and LSM antisymmetric.…”

Section: Electrical Property Analysismentioning

confidence: 99%

“…In , hexagonal pads arranged in honeycomb lattice and connected to the ground plane by substrate vias form the photonic crystal FSS walls. More recently, rectangular metal strips (dipole FSS) have successfully been used for the realization of quasi‐TEM hard waveguides in .…”

Section: Introductionmentioning

confidence: 99%

Quasi‐TEM Rectangular Waveguides with Frequency Selective Surface Walls: Part I–Electrical Properties and Geometrical Characteristics

Mallat

2013

Int J Numerical Modelling

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Electrical properties and geometrical characteristics of frequency‐selective‐surface‐loaded quasi‐transverse electromagnetic (TEM) rectangular waveguides are investigated in detail. The properties of electrical field distributions over the cross section of waveguides at various periodical phase shift points are studied. The phenomena, in connection with artificial magnetic conductor (AMC), cavity resonance, and surface resonance, are discussed. A definition of bandwidth for AMC is proposed on the basis of the variation of average z‐polarized electric fields along z‐axis between two side dielectric surfaces. Standard deviation technique is used to describe the uniformity of electrical fields and cavity efficiency is defined to represent the percentage of useful cavity with uniform electrical fields. The dispersion relationship, bandwidths of AMC and single mode, and cavity efficiency for various types of AMC surfaces are examined and compared. The geometrical characteristics of quasi‐TEM waveguides are studied in both theory and experiment. Design rules for high‐quality quasi‐TEM waveguides are proposed. Copyright © 2013 John Wiley & Sons, Ltd.

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“…It has been shown that a TEM parallel-plate mode can be realized in a rectangular waveguide by replacing the metallic sidewalls with photonic bandgap structures [4,5] and more recently with metamaterials [6][7][8][9][10][11]. Unlike a photonic-bandgap material, a high-impedance surface does not suppress surfaces waves through Bragg scattering from a periodic unit cell.…”

Section: Tem Waveguidesmentioning

confidence: 99%

Measurement and analysis of horn antennas with integrated high impedance surfaces

Forman

2009

2009 International Conference on Electromagnetics in Advanced Applications

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Rectangular horn antennas with integrated Sievenpiper high-impedance surfaces are presented. This highimpedance surface approximates a magnetic conductor, allowing TEM propagation within its stopband. This enables the horn antennas to operate at frequencies that would otherwise be below the TE 1,0 cutoff frequency. Because the unit cell of a Sievenpiper high-impedance can be arbitrarily small, such an antenna can be reduced in volume arbitrarily. Four antennas in two geometries with metal and high-impedance sidewalls are designed, measured, and compared.

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Quasi-TEM waveguides realized by FSS-walls

Cited by 12 publications

References 4 publications

Quasi‐TEM Rectangular Waveguides with Frequency Selective Surface Walls: Part II—Physical Mechanism

Quasi‐TEM Rectangular Waveguides with Frequency Selective Surface Walls: Part II—Physical Mechanism

Quasi‐TEM Rectangular Waveguides with Frequency Selective Surface Walls: Part I–Electrical Properties and Geometrical Characteristics

Measurement and analysis of horn antennas with integrated high impedance surfaces

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