Fully Distributed Tunable Bandpass Filter Based on Ba0.5Sr0.5TiO3 Thin-Film Slow-Wave Structure
Joint Authors
Oh, JaeHo
Li, Lin
Delprat, Sébastien L.
Ismail, Marwa
Xu, Feng
Wu, Ke
Djoumessi, Erick E.
Chaker, Mohamed
Source
International Journal of Microwave Science and Technology
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-10-02
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
This paper presents simulation and measurement results of fully distributed tunable coplanar bandpass filters (BPFs) with center frequencies around 6 GHz that make use of ferroelectric Barium Strontium Titanate (BaxSr1−xTiO3 or BST-x) thin film as tunable material.
The two experimental bandpass filters tested are based on a novel frequency-agile structure composed of cascaded half wavelength slow-wave resonators (2 poles) and three coupled interdigital capacitors (IDCs) optimized for bias voltage application.
Devices with gap dimensions of 10 and 3 μm are designed and fabricated with a two-step process on polycrystalline Ba0.5Sr0.5TiO3 thin films deposited on alumina substrate.
A frequency tunability of 9% is obtained for the 10 μm gap structure at ±30 V with 7 dB insertion loss (the BST dielectric tunability being 26% with 0.04 loss tangent for this gap size).
When the structure gap is reduced to 3 μm the center frequency shifts with a constant 9 dB insertion loss from 6.95 GHz at 0 V to 9.05 GHz at ±30 V, thus yielding a filter tunability of 30% (the BST dielectric tunability being 60% with 0.04 loss tangent for this gap size), a performance comparable to some extent to localized or lumped element BPFs operating at microwave frequency (>2 GHz).
American Psychological Association (APA)
Delprat, Sébastien L.& Oh, JaeHo& Xu, Feng& Li, Lin& Djoumessi, Erick E.& Ismail, Marwa…[et al.]. 2011. Fully Distributed Tunable Bandpass Filter Based on Ba0.5Sr0.5TiO3 Thin-Film Slow-Wave Structure. International Journal of Microwave Science and Technology،Vol. 2011, no. 2011, pp.1-9.
https://search.emarefa.net/detail/BIM-473871
Modern Language Association (MLA)
Delprat, Sébastien L.…[et al.]. Fully Distributed Tunable Bandpass Filter Based on Ba0.5Sr0.5TiO3 Thin-Film Slow-Wave Structure. International Journal of Microwave Science and Technology No. 2011 (2011), pp.1-9.
https://search.emarefa.net/detail/BIM-473871
American Medical Association (AMA)
Delprat, Sébastien L.& Oh, JaeHo& Xu, Feng& Li, Lin& Djoumessi, Erick E.& Ismail, Marwa…[et al.]. Fully Distributed Tunable Bandpass Filter Based on Ba0.5Sr0.5TiO3 Thin-Film Slow-Wave Structure. International Journal of Microwave Science and Technology. 2011. Vol. 2011, no. 2011, pp.1-9.
https://search.emarefa.net/detail/BIM-473871
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-473871