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Browse Journals & Magazines > Microwave and Wireless Compon ...> Volume:16 Issue:4 Help

Composite right/left handed transmission line phase shifter using ferroelectric varactors

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4 Author(s)
Kuylenstierna, D. ; Dept. of Microtechnology & Nanoscience, Chalmers Univ. of Technol., Goteborg, Sweden ; Vorobiev, A. ; Linner, P. ; Gevorgian, S.

A composite right/left handed (CRLH) transmission line (TL) phase shifter, using ferroelectric (Ba0.25Sr0.75TiO3) varactors as tunable element, is presented for the first time. It is theoretically and experimentally demonstrated how the unique features of CRLH TLs, enables a differential phase shift with flat frequency dependence around the center frequency. The experimental prototype is a coplanar design integrated on a high resistive Si substrate. It includes four CRLH T-unit cells and has a physical length of 3850μm. The ferroelectric varactors are realized in parallel plate version. Under 15-V dc bias applied over each varactor, the differential phase shift is flat around 17GHz and has an absolute value of 50°.

Published in:
Microwave and Wireless Components Letters, IEEE  (Volume:16 ,  Issue: 4 )

Date of Publication: April 2006

Page(s):
167 - 169
ISSN :
1531-1309
INSPEC Accession Number:
8974493
Digital Object Identifier :
10.1109/LMWC.2006.872145
Product Type:
Journals & Magazines
Date of Current Version :
03 April 2006
Issue Date :
April 2006
Sponsored by :
IEEE Microwave Theory and Techniques Society

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