BST-varactor tunable dual-mode filter using variable Z transmission line

Y.-H. Chun; J.-S. Hong; M.J. Lancaster; P. Bao; T.J. Jackson

doi:10.1109/LMWC.2008.916778

BST-varactor tunable dual-mode filter using variable Z transmission line

Y.-H. Chun, J.-S. Hong, M.J. Lancaster, P. Bao, T.J. Jackson

Electronic, Electrical and Systems Engineering

Research output: Contribution to journal › Article › peer-review

45 Citations (Scopus)

Abstract

Ferroelectric materials like Barium-Strontium-Titanate (BST) have become attractive for microwave tunable circuit applications. This letter presents an investigation of BST-varactor tunable dual-mode filter using variable characteristic impedance or Z transmission line. The interdigital BST varactors are fabricated and modeled, which are then deployed to realize a bandpass filter with tunable bandwidth capability. The use of tunable impedance line provides additional flexibilities in the design of microwave tunable circuits. A tunable bandpass filter of this type with a center frequency of 1.8 GHz and a bandwidth tuning ratio of 1.15:1 is demonstrated experimentally.

Original language	English
Pages (from-to)	167-169
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	18
Issue number	3
DOIs	https://doi.org/10.1109/LMWC.2008.916778
Publication status	Published - 1 Mar 2008

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10.1109/LMWC.2008.916778

Advanced Microwave Devices for Frequency-Agile Applications
Lancaster, M. & Jackson, T.
Engineering & Physical Science Research Council
28/11/05 → 27/05/09
Project: Research Councils

Cite this

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BST-varactor tunable dual-mode filter using variable Z transmission line

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Advanced Microwave Devices for Frequency-Agile Applications

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