Faculty Publications

Title

A K-Band Tunable Microstrip Bandpass Filter Using a Thin-Film Conductor/Ferroelectric/Dielectric Multilayer Configuration

Document Type

Article

Keywords

Ferroelectric thin films, K-band frequencies, Multilayer structures, Tunable bandpass filters

Journal/Book/Conference Title

IEEE Microwave and Guided Wave Letters

Volume

8

Issue

2

First Page

78

Last Page

80

Abstract

We report on a gold/strontium titanate (Au/SrTiO3) thin-film K-band tunable bandpass filter on a lanthanum aluminate substrate. The two-pole filter has a center frequency of 19 GHz and a 4% bandwidth. Tunability is achieved through the nonlinear temperature dependence and the dc electric field dependence of the relative dielectric constant of SrTiO3. A center frequency shift of 0.85 GHz was obtained at 400-V dc bias and 77 K without degrading the insertion loss of the filter.

Original Publication Date

2-1-1998

DOI of published version

10.1109/75.658647

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