Bandwidth considerations for a microstrip reflectarray

Bialkowski, M.E. and Sayidmarie, K.H. (2008) Bandwidth considerations for a microstrip reflectarray. Progress in Electromagnetics Research B, 3 173-187.

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Author Bialkowski, M.E.
Sayidmarie, K.H.
Title Bandwidth considerations for a microstrip reflectarray
Journal name Progress in Electromagnetics Research B   Check publisher's open access policy
ISSN 1937-6472
Publication date 2008
Year available 2008
Sub-type Article (original research)
Open Access Status File (Publisher version)
Volume 3
Start page 173
End page 187
Total pages 15
Editor Chew, W.C.
Place of publication USA
Publisher Electromagnetics Academy
Collection year 2009
Language eng
Subject C1
100501 Antennas and Propagation
869999 Manufacturing not elsewhere classified
Formatted abstract
The paper describes a theoretical investigation into a limited bandwidth operation of a microstrip reflectarray. Two main
factors limiting the bandwidth are considered. One is related to the requirement of phase compensation to convert a spherical wavefront launched by a feed into a planar wavefront. The other one is linked to the limited phasing range of microstrip antenna elements. The two factors contribute to the reflectarray phasing errors that in turn reduce its gain as a function of frequency. Simple formulas for an upper bound of gain bandwidth are derived, assuming the phase compensation by the elements is independent of frequency changes and verified against the results produced by other researchers. It is shown that the phase errors incurred in the path equalization to obtain conversion from spherical to planar wavefronts have a more profound effect on the reduction of operational bandwidth of the reflectarray than the phase truncation implemented on the required phase from each element. 
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Information Technology and Electrical Engineering Publications
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Created: Fri, 10 Apr 2009, 17:32:45 EST by Donna Clark on behalf of School of Information Technol and Elec Engineering