Show simple item record Shafai, L Sharma, SK Shafai, L Daneshmand, M Mousavi, P 2007-10-03T13:01:31Z 2007-10-03T13:01:31Z 2006-05-31T13:01:31Z
dc.identifier.citation 0018-926X; IEEE TRANS ANTENNAS PROPAGAT, MAY 2006, vol. 54, no. 5, p.1467 to 1473. en
dc.description.abstract In this paper, the far-field phase shift properties of microstrip patch antennas are investigated. It is shown that, similar to reflectarrays, the resonant nature of microstrip patches can be used to change the phase of the radiated field. This phase change can be caused by the dimensional change of the microstrip patch, or by a reactive loading of its cavity such as an aperture on its ground plane. However, the available phase shift is limited by the antenna impedance bandwidth. The problem is initially investigated for conventional patch antennas, determining the available phase shift range. It is then studied for a wideband E-slot microstrip antenna, showing a considerably larger phase shift range. Then, a micro-electro-mechanical (MEM) based ground plane membrane, activated by an electrode from below, is proposed to adaptively generate and control the required phase shifts. It provides a low loss, continuously variable phase shifter that can be used at high frequencies for beam scanning in small arrays. en
dc.format.extent 959928 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.rights ©2006 IEEE. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Manitoba's products or services. Internal or 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 must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it. en
dc.subject far-field phase shift en
dc.subject frequency tuning en
dc.subject microstrip antenna en
dc.subject microstrip array en
dc.subject phased array en
dc.subject ANTENNAS en
dc.title Phase shift bandwidth and scan range in microstrip arrays by the element frequency tuning en
dc.status Peer reviewed en

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