Tunable and adaptive bandpass filter using a nonlinear dielectric thin film of SrTiO{sub 3}
- Superconductivity Technology Center, Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- Center for Superconductivity Research, University of Maryland, College Park, Maryland 20742 (United States)
- Electronic Materials and Device Research, Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
We have prepared an electrically tunable and adaptive 3-pole half-wave bandpass coplanar waveguide filter incorporating a 1.2-{mu}m-thick paraelectric SrTiO{sub 3} bottom layer and a 0.4-{mu}m-thick superconducting YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} top electrode layer on a LaAlO{sub 3} substrate. By applying a separate bias voltage on each pole and also on each coupling capacitance of the device at 4 and 76 K, the filter response is not only fine tuned to achieve symmetric and optimized filter characteristics with less than 2{percent} bandwidth centered around 2.5 GHz, but also broadband tuned to shift the passband by more than 15{percent}. {copyright} {ital 1996 American Institute of Physics.}
- OSTI ID:
- 278903
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 12 Vol. 68; ISSN 0003-6951; ISSN APPLAB
- Country of Publication:
- United States
- Language:
- English
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