A tunable combline bandpass filter using barium strontium titanate interdigital varactors on an alumina substrate

Jayesh Nath; Dipankar Ghosh; Wael Fathelbab; Jon Paul Maria; Angus I. Kingon; Paul D. Franzon; Michael B. Steer

doi:10.1109/MWSYM.2005.1516670

A tunable combline bandpass filter using barium strontium titanate interdigital varactors on an alumina substrate

Jayesh Nath, Dipankar Ghosh, Wael Fathelbab, Jon Paul Maria, Angus I. Kingon, Paul D. Franzon, Michael B. Steer

Materials Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

13 Scopus citations

Abstract

Barium Strontium Titanate (BST) has a field-dependent permittivity that enables it to be used as a dielectric in a voltage-tunable capacitor or varactor. A tunable combline bandpass filter was designed and characterized using BST varactors fabricated on a polycrystalline alumina substrate with copper metallization and is 14 mm × 14 mm in size. The center frequency of the filter varies from 1.6 to 2.0 GHz with the application of 200 V tuning voltage. A 25% tuning range was achieved using a tuning field strength of 300 kV/cm. The zero bias insertion loss was 6.6 dB and this decreased to 4.3 dB at the high bias state. The return loss was better than 10 dB.

Original language	English (US)
Title of host publication	2005 IEEE MTT-S International Microwave Symposium Digest
Pages	595-598
Number of pages	4
DOIs	https://doi.org/10.1109/MWSYM.2005.1516670
State	Published - 2005
Event	2005 IEEE MTT-S International Microwave Symposium - Long Beach, CA, United States Duration: Jun 12 2005 → Jun 17 2005

Publication series

Name	IEEE MTT-S International Microwave Symposium Digest
Volume	2005
ISSN (Print)	0149-645X

Other

Other	2005 IEEE MTT-S International Microwave Symposium
Country/Territory	United States
City	Long Beach, CA
Period	6/12/05 → 6/17/05

All Science Journal Classification (ASJC) codes

Radiation
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1109/MWSYM.2005.1516670

Cite this

Nath, J., Ghosh, D., Fathelbab, W., Maria, J. P., Kingon, A. I., Franzon, P. D., & Steer, M. B. (2005). A tunable combline bandpass filter using barium strontium titanate interdigital varactors on an alumina substrate. In 2005 IEEE MTT-S International Microwave Symposium Digest (pp. 595-598). Article 1516670 (IEEE MTT-S International Microwave Symposium Digest; Vol. 2005). https://doi.org/10.1109/MWSYM.2005.1516670

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title = "A tunable combline bandpass filter using barium strontium titanate interdigital varactors on an alumina substrate",

abstract = "Barium Strontium Titanate (BST) has a field-dependent permittivity that enables it to be used as a dielectric in a voltage-tunable capacitor or varactor. A tunable combline bandpass filter was designed and characterized using BST varactors fabricated on a polycrystalline alumina substrate with copper metallization and is 14 mm × 14 mm in size. The center frequency of the filter varies from 1.6 to 2.0 GHz with the application of 200 V tuning voltage. A 25% tuning range was achieved using a tuning field strength of 300 kV/cm. The zero bias insertion loss was 6.6 dB and this decreased to 4.3 dB at the high bias state. The return loss was better than 10 dB.",

author = "Jayesh Nath and Dipankar Ghosh and Wael Fathelbab and Maria, {Jon Paul} and Kingon, {Angus I.} and Franzon, {Paul D.} and Steer, {Michael B.}",

year = "2005",

doi = "10.1109/MWSYM.2005.1516670",

language = "English (US)",

isbn = "0780388461",

series = "IEEE MTT-S International Microwave Symposium Digest",

pages = "595--598",

booktitle = "2005 IEEE MTT-S International Microwave Symposium Digest",

note = "2005 IEEE MTT-S International Microwave Symposium ; Conference date: 12-06-2005 Through 17-06-2005",

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Nath, J, Ghosh, D, Fathelbab, W, Maria, JP, Kingon, AI, Franzon, PD & Steer, MB 2005, A tunable combline bandpass filter using barium strontium titanate interdigital varactors on an alumina substrate. in 2005 IEEE MTT-S International Microwave Symposium Digest., 1516670, IEEE MTT-S International Microwave Symposium Digest, vol. 2005, pp. 595-598, 2005 IEEE MTT-S International Microwave Symposium, Long Beach, CA, United States, 6/12/05. https://doi.org/10.1109/MWSYM.2005.1516670

A tunable combline bandpass filter using barium strontium titanate interdigital varactors on an alumina substrate. / Nath, Jayesh; Ghosh, Dipankar; Fathelbab, Wael et al.
2005 IEEE MTT-S International Microwave Symposium Digest. 2005. p. 595-598 1516670 (IEEE MTT-S International Microwave Symposium Digest; Vol. 2005).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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A tunable combline bandpass filter using barium strontium titanate interdigital varactors on an alumina substrate

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