MSpace - DSpace at UofM >
Research Publications from University of Manitoba Researchers >
Research Publications (UofM Student, Faculty and Staff only access) >

Please use this identifier to cite or link to this item:

Title: Microstrip phase shifter using ground-plane reconfiguration
Authors: Shafai, C
Sharma, SK
Shafai, L
Chrusch, DD
Keywords: microelectromechanical system (MEMS)
phase shifter
reconfigurable antenna
Issue Date: 31-Jan-2004
Citation: 0018-9480; IEEE TRANS MICROWAVE THEORY, JAN 2004, vol. 52, no. 1, p.144 to 153.
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.
Appears in Collection(s):Research Publications (UofM Student, Faculty and Staff only access)

Files in This Item:

File Description SizeFormat
Shafai_Microstrip_phase_shifter.pdf737.71 kBAdobe PDFView/Open
View Statistics

Items in MSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


Valid XHTML 1.0! MSpace Software Copyright © 2002-2010  Duraspace - Feedback