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Title: Planar electromagnetic bandgap structures based on polar curves and mapping functions
Authors: Mulenga, Charity B.
Flint, James A.
Keywords: Electromagnetic bandgap (EBG)
Mapping functions
Metamaterials
Polar curves
Issue Date: 2010
Publisher: © IEEE
Citation: MULENGA, C.B. and FLINT, J.A., 2010. Planar electromagnetic bandgap structures based on polar curves and mapping functions. IEEE Transactions on Antennas and Propagation, 58(3), pp. 790-797
Abstract: A type of electromagnetic bandgap structure is described that is easily parameterized and can produce a range of square and spiral geometries. Individual electromagnetic bandgap (EBG) geometries are defined on a cell-by-cell basis in terms of their convolution factor , which defines the extent to which the elements are interleaved and controls the coupling slot length between adjacent elements. Polar equations are used to define the slot locus which also incorporate a transformation which ensures the slot extends into the corners of the square unit cell and hence extends the maximum slot length achievable. The electromagnetic properties of the so-called polar EBG are evaluated by means of numerical simulation and measurements and dispersion diagrams are presented. Finally, the performance is compared with other similar miniaturized EBG cell geometries. It is shown that the polar EBG has better angular stability than the equivalent square patch design and is comparable in terms of performance to other low frequency EBG elements. At the same time it retains the ability to fine tune the response by adjusting .
Description: This article was published in the journal, IEEE Transactions on Antennas and Propagation [© IEEE]. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Version: Published
DOI: 10.1109/TAP.2009.2039319
URI: https://dspace.lboro.ac.uk/2134/6121
ISSN: 0018-926X
Appears in Collections:Published Articles (Electronic, Electrical and Systems Engineering)

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