A K-Band Tunable Microstrip Bandpass Filter Using a Thin-Film Conductor/Ferroelectric/Dielectric Multilayer Configuration
Ferroelectric thin films, K-band frequencies, Multilayer structures, Tunable bandpass filters
IEEE Microwave and Guided Wave Letters
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
DOI of published version
Subramanyam, Guru; Van Keuls, Fred; and Miranda, Félix A., "A K-Band Tunable Microstrip Bandpass Filter Using a Thin-Film Conductor/Ferroelectric/Dielectric Multilayer Configuration" (1998). Faculty Publications. 3882.