81-Element single-layer reflectarray with double-ring phasing elements for wideband applications

Li, Yuezhou, Bialkowski, M.E., Sayidmarie, K.H. and Shuley, N.V. (2010). 81-Element single-layer reflectarray with double-ring phasing elements for wideband applications. In: Proceedings, 2010 IEEE International Symposium Antennas and Propagation and CNC-USNC/URSI. 2010 IEEE International Symposium Antennas and Propagation and CNC-USNC/URSI, Toronto, ON, Canada, (1-4). 11-17 July 2010. doi:10.1109/APS.2010.5562103

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Author Li, Yuezhou
Bialkowski, M.E.
Sayidmarie, K.H.
Shuley, N.V.
Title of paper 81-Element single-layer reflectarray with double-ring phasing elements for wideband applications
Conference name 2010 IEEE International Symposium Antennas and Propagation and CNC-USNC/URSI
Conference location Toronto, ON, Canada
Conference dates 11-17 July 2010
Proceedings title Proceedings, 2010 IEEE International Symposium Antennas and Propagation and CNC-USNC/URSI
Journal name 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010
Place of Publication Piscataway, NJ, USA
Publisher IEEE (Institute for Electrical and Electronic Engineers)
Publication Year 2010
Sub-type Fully published paper
DOI 10.1109/APS.2010.5562103
Open Access Status File (Author Post-print)
ISBN 9781424449682
Issue Article number 5562103
Start page 1
End page 4
Total pages 4
Language eng
Abstract/Summary A microstrip reflectarray antenna utilizes a planar array of printed patch elements and a conventional prime or offset feed to form an alternative to the parabolic reflector [1]. It transforms the spherical wave of the feed into the planar wave by employing microstrip patch elements as radiators and phase shifters. Due to the use of planar technology, it offers a good balance between conventional reflector antennas and phased arrays. Because it uses many radiating elements it provides flexibility with respect to radiation pattern formation [2-4]. Its disadvantage is a limited operational bandwidth, which for the case of moderate gain is mainly due to a limited phase range and a high phase slope of the elements. In the wave transformation process, a full phasing range of 360° is desirable for unit cells containing patch elements. However, a variable size patch antenna developed on a single layer substrate offers a phasing range of about 300°. To overcome this problem, multilayer substrates including stacked variable-size patches for phasing the unit cells of a reflectarray have been devised to extend the phase range to multiples of 360°. The multi-layer approach with stacked patches not only extends the phase range but also reduces the slope of the phase curve as a function of patch dimensions [5-6]. However, the use of multi-layer substrates means that in practice layers of the reflectarray have to be manufactured separately and the assembly should leave no air gaps. This results in an elaborate and expensive manufacturing process. To overcome this problem, printed double-ring elements to form a single-layer reflectarray have been proposed. The double rings improve the phasing range of unit cells by utilizing multi-resonance behaviour. The extended range for unit cells containing double-ring elements has been demonstrated for the case of normal (TEM) wave incidence [7]. The assumption of normal incidence is less accurate for peripheral elements. Therefore in [8], TE and TM waves were considered to obtain an oblique incidence to obtain more accurate phasing characteristics of unit cells. © 2010 IEEE.
Keyword Air-gaps
Double ring
Extended range
Manufacturing process
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Fri, 04 Mar 2011, 23:37:12 EST by Professor Marek Bialkowski on behalf of School of Information Technol and Elec Engineering