Modal Propagation and Excitation on a Wire-Medium Slab

Burghignoli, Paolo; Lovat, Giampiero; Capolino, Filippo; Jackson, David R.; Wilton, Donald R.

doi:10.1109/tmtt.2008.921657

Cited by 29 publications

(13 citation statements)

References 19 publications

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“…The subject of LWs has been largely studied in the past, including their role in producing narrow beam radiation [1][2][3][4][5][6][7][8]. A leaky wave may be excited by placing a periodic set of perturbations on a slow wave structure, like an integrated waveguide, which has an open aperture so that radiation can leak out.…”

Section: Introductionmentioning

confidence: 99%

Theory of a Directive Optical Leaky Wave Antenna Integrated into a Resonator and Enhancement of Radiation Control

Guclu

Campione

Boyraz

et al. 2014

J. Lightwave Technol.

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Abstract-We provide for the first time the detailed study of the radiation performance of an optical leaky wave antenna (OLWA) integrated into a Fabry-Pérot resonator. We show that the radiation pattern can be expressed as the one generated by the interference of two leaky waves counter-propagating in the resonator leading to a design procedure for achieving optimized broadside radiation, i.e., normal to the waveguide axis. We thus report a realizable implementation of the OLWA made of semiconductor and dielectric regions. The theoretical modeling is supported by full-wave simulation results, which are found to be in good agreement. We aim to control the radiation intensity in the broadside direction via excess carrier generation in the semiconductor regions. We show that the presence of the resonator can provide an effective way of enhancing the radiation level modulation, which reaches values as high as 13.5 dB, paving the way for novel promising control capabilities that might allow the generation of very fast optical switches, as an example.Index Terms-Optical leaky wave antenna; Fabry-Pérot resonator.

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Section: Introductionmentioning

confidence: 99%

Theory of a Directive Optical Leaky Wave Antenna Integrated into a Resonator and Enhancement of Radiation Control

Guclu

Campione

Boyraz

et al. 2014

J. Lightwave Technol.

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“…1 is an isotropic for electromagnetic waves with an arbitrary polarization, and as such, it requires the use of an uniaxial permittivity with an optical axis parallel to the wire (y) axis. When the wire medium structure is homogenized, the wavelengths become sufficiently larger than the wire spacing [5]. Additionally, the wire medium structure consists of a finite number N of periodic layers of thin conducting cylinders embedded in a dielectric sheet with relative permittivity ( rh…”

Section: Theory and Configuration Of The Wire Medium Structurementioning

confidence: 99%

“…These structures consist of a periodic arrangement of metallic wires that perfectly conduct cylinders (wires) in an infinitely long and parallel rectangular lattice, which is embedded inside a homogeneous host medium of dielectric constant. The electromagnetic properties of this material can be described in terms of the effective permittivity that occurs with the advent of the metamaterials [5,6].…”

mentioning

confidence: 99%

Creating a Gain Enhancement Technique for a Conical Horn Antenna by Adding a Wire Medium Structure at the Aperture

Duangtang¹,

Mesawad²,

Wongsan³

2016

Journal of electromagnetic engineering and science

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“…Wire-based superstrates are commonly employed for designs of leaky-wave antennas [17], [18] and Fabry-Pérot cavity antennas [19]. A different strategy is followed here: the antenna and superstrate are near-field coupled, and the grids of wires are designed to excite strong current loops in the pass-band [16], thus increasing the antenna aperture and, consequently, increasing the antenna gain.…”

Section: Meta-surface Designmentioning

confidence: 99%

Multi-Functional Antennas Based on Meta-Surfaces

Liberal¹,

Ederra²,

Teniente³

et al. 2012

IEEE Trans. Antennas Propagat.

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The design of a multi-functional antenna based on meta-surfaces is investigated. The proposed structure consists of a wideband dipole antenna located between two meta-surfaces working in different frequency bands. The result is an antenna with enhanced gain that radiates in a different half-space at each frequency band. A prototype composed of an elliptical dipole and two meta-surfaces formed by grids of cut and continuous wires demonstrates that the proposed antenna discriminates the radiation in different half-spaces, as well as increases the gain of a nearly omnidirectional dipole to values 8.9 dBi and 7.7 dBi for the top and bottom half-spaces, respectively. Moreover, the antenna remains planar with total thickness of 0 13 at the lowest resonant frequency.Index Terms-Low-profile antenna, meta-surfaces, multi-functional antenna, spatial diversity.

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Modal Propagation and Excitation on a Wire-Medium Slab

Cited by 29 publications

References 19 publications

Theory of a Directive Optical Leaky Wave Antenna Integrated into a Resonator and Enhancement of Radiation Control

Theory of a Directive Optical Leaky Wave Antenna Integrated into a Resonator and Enhancement of Radiation Control

Creating a Gain Enhancement Technique for a Conical Horn Antenna by Adding a Wire Medium Structure at the Aperture

Multi-Functional Antennas Based on Meta-Surfaces

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