X-Band Phased Array Antenna Using Ferroelectric (Ba,Sr)TiO3 Coplanar Waveguide Phase Shifter

A phased array antenna was fabricated using four‐element ferroelectric phase shifters with a coplanar waveguide (CPW) transmission line structure based on a Ba0.6Sr0.4TiO3(BST)/MgO structure. Epitaxial BST films were deposited on MgO (001) substrates by pulsed laser deposition. To attain the large d...

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Bibliographic Details
Published in:ETRI journal 2005, 27(6), , pp.677-684
Main Authors: Moon, Seung Eon, Ryu, Han Cheol, Kwak, Min Hwan, Kim, Young Tae, Lee, Su‐Jae, Kang, Kwang‐Yong
Format: Article
Language:English
Subjects:
Ferroelectric phase shifter
impedance matching
phased array antenna
전자/정보통신공학
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Summary:A phased array antenna was fabricated using four‐element ferroelectric phase shifters with a coplanar waveguide (CPW) transmission line structure based on a Ba0.6Sr0.4TiO3(BST)/MgO structure. Epitaxial BST films were deposited on MgO (001) substrates by pulsed laser deposition. To attain the large differential phase shift and small losses for a ferroelectric CPW phase shifter, an impedance‐matching‐part adding technique between the effective transmission line and connecting cable was used. The return loss and insertion loss for this technique‐adapted BST CPW device were improved with respect to those for a normal BST CPW device. For an X‐band phased array antenna system consisting of ferroelectric BST CPW phase shifters, power divider, dc block, patch antenna, and programmed dc power, the steering beam could be tilted by 15° in either direction.
ISSN:1225-6463
2233-7326
DOI:10.4218/etrij.05.0105.0024