Analysis of Nonsquare Artificial Dielectric Layers and Application to the Design of Anisotropic Slabs

Ralph M. van Schelven; Daniele Cavallo

doi:10.1109/LAWP.2021.3128724

Analysis of Nonsquare Artificial Dielectric Layers and Application to the Design of Anisotropic Slabs

Ralph M. van Schelven, Daniele Cavallo^*

^*Corresponding author for this work

Tera-Hertz Sensing

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Abstract

We present a general analysis to describe nonsquare artificial dielectric layers (ADLs). Closed-form expressions for the equivalent layer impedance are given for generic plane-wave incidence, assuming that the ADLs have different geometrical parameters in the {x}-and {y}-directions. The analytical expressions account for the interaction between the layers due to higher order Floquet modes, thus remain valid for arbitrarily small electrical distance between layers. Such nonsquare geometries allow the design of artificial anisotropic slabs with azimuth-dependent effective refractive index. As an example for an application, the equivalent model is used to design the superstrate of a double-slot antenna, with independent pattern shaping in the two main planes.

Original language	English
Article number	9618815
Pages (from-to)	302-306
Number of pages	5
Journal	IEEE Antennas and Wireless Propagation Letters
Volume	21
Issue number	2
DOIs	https://doi.org/10.1109/LAWP.2021.3128724
Publication status	Published - 2022

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

Artificial dielectrics
equivalent circuit
pattern shaping
spectral domain methods

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10.1109/LAWP.2021.3128724

Analysis_of_Nonsquare_Artificial_Dielectric_Layers_and_Application_to_the_Design_of_Anisotropic_SlabsFinal published version, 1.76 MB

Cite this

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title = "Analysis of Nonsquare Artificial Dielectric Layers and Application to the Design of Anisotropic Slabs",

abstract = "We present a general analysis to describe nonsquare artificial dielectric layers (ADLs). Closed-form expressions for the equivalent layer impedance are given for generic plane-wave incidence, assuming that the ADLs have different geometrical parameters in the {x}-and {y}-directions. The analytical expressions account for the interaction between the layers due to higher order Floquet modes, thus remain valid for arbitrarily small electrical distance between layers. Such nonsquare geometries allow the design of artificial anisotropic slabs with azimuth-dependent effective refractive index. As an example for an application, the equivalent model is used to design the superstrate of a double-slot antenna, with independent pattern shaping in the two main planes.",

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N2 - We present a general analysis to describe nonsquare artificial dielectric layers (ADLs). Closed-form expressions for the equivalent layer impedance are given for generic plane-wave incidence, assuming that the ADLs have different geometrical parameters in the {x}-and {y}-directions. The analytical expressions account for the interaction between the layers due to higher order Floquet modes, thus remain valid for arbitrarily small electrical distance between layers. Such nonsquare geometries allow the design of artificial anisotropic slabs with azimuth-dependent effective refractive index. As an example for an application, the equivalent model is used to design the superstrate of a double-slot antenna, with independent pattern shaping in the two main planes.

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Analysis of Nonsquare Artificial Dielectric Layers and Application to the Design of Anisotropic Slabs

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