Show simple item record Shafai, C Sharma, SK Shafai, L Chrusch, DD 2007-10-04T17:56:39Z 2007-10-04T17:56:39Z 2004-01-31
dc.identifier.citation 0018-9480; IEEE TRANS MICROWAVE THEORY, JAN 2004, vol. 52, no. 1, p.144 to 153. en
dc.description.abstract In this paper, a new reconfigurable microstrip structure is presented where line impedance can be actively controlled to induce phase shift on a transmission-line signal. Micromachining is used to fabricate thin-film copper membranes in the ground plane below the transmission line. Actuation of these membranes enables control of transmission-line to ground-plane spacing and, thus, the line capacitance. The performance of this reconfigurable microstrip transmission line as a phase shifter is investigated between 5-32 GHz for a variety of membrane geometries. A phase shift of up to -32.1degrees at 15.00 GHz is achieved by actuating an array of five 4.3-mm-diameter membranes beneath a 30-Omega microstrip line. A single 10.0-mm-diameter membrane achieved a phase shift of -25.57degrees at 15.05 GHz on a 5642 line, while a 10.4-mm membrane achieved a phase shift of -55.5degrees at 14.25 GHz on a 30-Omega line. Both single and multiple series ground-plane membranes are possible, and they can be activated with discrete or continuous control signals, individually or together. Discrete and continuous phased array beam steering are, therefore, feasible. en
dc.format.extent 755414 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.rights ©2004 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.rights info:eu-repo/semantics/restrictedAccess
dc.subject microelectromechanical system (MEMS) en
dc.subject membrane en
dc.subject micromachining en
dc.subject microstrip en
dc.subject phase shifter en
dc.subject reconfigurable antenna en
dc.subject BAND en
dc.title Microstrip phase shifter using ground-plane reconfiguration en
dc.status Peer reviewed en

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