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Journal Article Microwave Properties of Tunable Phase Shifter Using Superconductor/Ferroelectric Thin Films
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Authors
Min Hwan Kwak, Young Tae Kim, Seung Eon Moon, Han Cheol Ryu, Su Jae Lee, Kwang Yong Kang
Issue Date
2005-04
Citation
Integrated Ferroelectrics, v.77, no.1, pp.79-85
ISSN
1058-4587
Publisher
Taylor & Francis
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1080/10584580500414150
Project Code
04MB5700, Ferroelectric phase shifter MMIC technology for phase arrary system, Su Jae Lee
Abstract
High temperature superconductor, YBa2Cu3O 7-灌 (YBCO), and ferroelectric, Ba0.1Sr 0.9TiO3 (BST), multilayer thin films were deposited on MgO (100) substrates using a pulsed laser deposition. The thin films exhibited only (001) peaks of YBCO and BST. The HTS thin films demonstrated excellent zero resistance temperature of 92.5 K. We designed and fabricated HTS ferroelectric phase shifter using high frequency system simulator and standard photolithography method, respectively. The YBCO/BST phase shifter shows a low insertion loss (2.97 dB) and large phase change (162째) with dc bias of 40 V at operating frequency of 10 GHz. The HTS ferroelectric phase shifter shows 54 of figure of merit. These results can be applicable to phased array antenna system for satellite communication services.
KSP Keywords
10 Ghz, Figure of merit, High Frequency(HF), Microwave properties, Operating frequency, Phase change, Phased array antenna system, Pulsed-laser deposition(PLD), Zero resistance temperature, dc bias, distributed antenna systems(DAS)