Fractal unit cells of increased phasing range and low slopes for single-layer microstrip reflectarrays

Sayidmarie, K. H. and Bialkowski, M. E. (2011) Fractal unit cells of increased phasing range and low slopes for single-layer microstrip reflectarrays. IET Microwaves Antennas and Propagation, 5 11: 1371-1379. doi:10.1049/iet-map.2010.0581


Author Sayidmarie, K. H.
Bialkowski, M. E.
Title Fractal unit cells of increased phasing range and low slopes for single-layer microstrip reflectarrays
Journal name IET Microwaves Antennas and Propagation   Check publisher's open access policy
ISSN 1751-8725
1751-8733
Publication date 2011-08
Sub-type Article (original research)
DOI 10.1049/iet-map.2010.0581
Volume 5
Issue 11
Start page 1371
End page 1379
Total pages 9
Place of publication Herts, United Kingdom
Publisher The Institution of Engineering and Technology
Collection year 2012
Language eng
Abstract This study reports investigations into phase characteristics of a unit cell of a single-layer microstrip reflectarray exploiting fractal geometries. The aim is to have the phase range larger than 360° accompanied by a smaller slope of the reflected wave phase as a function of the elements' size. These are required to achieve a wide operational bandwidth and a smaller sensitivity to manufacturing errors. To achieve this goal, multi-resonance fractal elements are investigated. It is shown that sliced patches of square and circular shapes as well as multiple rings printed on a thick substrate can offer slower phase slopes while maintaining phase ranges exceeding 360°. The achieved ranges and slopes of these elements are comparable with those of double-stacked patches printed on the equivalent low permittivity dielectric substrate. Choosing suitable dimensions and scaling factors of these elements, the phase characteristic can be made approximately a linear function of their size.
Keyword Millimeter-wave application
Printed reflectarrays
Variable size
Patch antenna
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Information Technology and Electrical Engineering Publications
 
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