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

Authors

G. Subramanyam, University of Northern Iowa
F. Van Keuls, University of Northern IowaFollow
F. A. Miranda, University of Northern IowaFollow

Document Type

Conference

Journal/Book/Conference Title

IEEE MTT-S International Microwave Symposium Digest

Volume

2

First Page

1011

Last Page

1014

Abstract

We report on YBCO/strontium titanate (STO) thin film K-band tunable bandpass filters on lanthanum aluminate substrates. The 2 pole filters were designed for a center frequency of 19 GHz and 4% bandwidth. Tunability is achieved through the non-linear dc electric field dependence of the relative dielectric constant of STO (εrSTO). Center frequency shifts greater than 2 GHz were obtained at a 400 V bipolar dc bias at temperatures below 77 K, with minimal degradation in the insertion loss of the filters.

Department

Department of Industrial Technology

Original Publication Date

1-1-1998

Recommended Citation

Subramanyam, G.; Van Keuls, F.; and Miranda, F. A., "Novel K-Band Tunable Microstrip Bandpass Filter Using A Thin Film Hts/Ferroelectric/Dielectric Multilayer Configuration" (1998). Faculty Publications. 3947.
https://scholarworks.uni.edu/facpub/3947