Tunable slotted ground structured bandstop filter with BST varactors

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

doi:10.1049/iet-map.2008.0308

Tunable slotted ground structured bandstop filter with BST varactors

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

School of Engineering & Physical Sciences

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

22 Citations (Scopus)

Abstract

This paper presents an investigation of a tunable bandstop filter (BSF) using slotted ground structure. A kind of open loop slot resonator is used for the bandstop response and its characteristics according to various dimensions are considered to decide a proper shape for the final design. A barium-strontium-titanate (BST) varactor chip is deployed to tune each resonator and its location is determined by electromagnetic simulation for an optimum frequency tuning. A three-pole tunable BSF of this type is measured at the centre frequency from 4.5 to 5.5GHz and its rejection is more than 20dB at the stop band while the insertion loss at the pass band is less than 1.5dB. © The Institution of Engineering and Technology 2009.

Original language	English
Pages (from-to)	870-876
Number of pages	7
Journal	IET Microwaves, Antennas and Propagation
Volume	3
Issue number	5
DOIs	https://doi.org/10.1049/iet-map.2008.0308
Publication status	Published - 2009

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10.1049/iet-map.2008.0308

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abstract = "This paper presents an investigation of a tunable bandstop filter (BSF) using slotted ground structure. A kind of open loop slot resonator is used for the bandstop response and its characteristics according to various dimensions are considered to decide a proper shape for the final design. A barium-strontium-titanate (BST) varactor chip is deployed to tune each resonator and its location is determined by electromagnetic simulation for an optimum frequency tuning. A three-pole tunable BSF of this type is measured at the centre frequency from 4.5 to 5.5GHz and its rejection is more than 20dB at the stop band while the insertion loss at the pass band is less than 1.5dB. {\textcopyright} The Institution of Engineering and Technology 2009.",

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Tunable slotted ground structured bandstop filter with BST varactors

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