DocumentCode
2405038
Title
Tunable bandstop filters using BST varactor chips
Author
Chun, Young-Hoon ; Hong, Jia-Sheng ; Bao, Peng ; Jackson, Timothy J. ; Lancaster, Michael J.
Author_Institution
Heriot-Watt Univ. Riccarton, Edinburgh
fYear
2007
fDate
9-12 Oct. 2007
Firstpage
110
Lastpage
113
Abstract
Ferroelectric Barium-Strontium-Titanate (BST) film varactor chips are fabricated and applied to the design of electronically tunable bandstop filters (BSFs) based on stepped impedance line resonator (SIR). Three different types of filters are designed and three different BST varactor chips are used to investigate the properties of BST varactors at microwave frequencies. The designed tunable BSFs show more than 30 dB of band rejection at the center frequency of 1.1 GHz with 10 % of frequency tuning ranges.
Keywords
band-stop filters; barium compounds; ferroelectric materials; microstrip resonators; tuning; varactors; BST varactor chips; band rejection; electronically tunable bandstop filters; ferroelectric barium-strontium-titanate film varactor chips; frequency tuning ranges; microwave frequency; stepped impedance line resonator; Binary search trees; Circuit optimization; Fabrication; Ferroelectric materials; Frequency; Microwave circuits; Microwave filters; Tunable circuits and devices; Tuning; Varactors;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Conference, 2007. European
Conference_Location
Munich
Print_ISBN
978-2-87487-001-9
Type
conf
DOI
10.1109/EUMC.2007.4405138
Filename
4405138
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