Title:
Planar Electromagnetic Bandgap Structures Based on Polar Curves and Mapping Functions
Author(s):
Charity B. Mulenga, James A. Flint
Source:
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Vol./Issue/Date:
Year:
2010
Page(s):
Keywords:
Electromagnetic bandgap (EBG), mapping functions, metamaterials, polar curves
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
Document:
Reference Id:
604
Back to References
Please note that this is a collection of external publications.
CST respects the copyrights of the respective owners and as such can not distribute said publications.
Details of copyright ownership is provided to the best of our knowledge. Please contact the given references for further information.