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Resonators for a 2 pole filter fabricated from YBCO coated LaAlO/sub 3/ cylinders.
- Source :
-
IEEE Transactions on Applied Superconductivity . 1997, Vol. 7 Issue 2, p2784-2787. 4p. - Publication Year :
- 1997
-
Abstract
- We prepared and tested dielectric resonators designed for a two pole filter. These resonators were LaAlO/sub 3/ single crystalline cylinders which were covered on the end faces by about 350 nm YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// thin films and on the cylindrical surface by 4 /spl mu/m gold films. The YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// films were c-axis oriented with mosaic spreads of about 0.3/spl deg/. The inductive transition temperatures were above 90 K. The HF properties were characterized by evaluation of the H/sub 011/ mode at 8.05 GHz, and by measuring the surface resistance at 18.9 GHz. At 77 K the Q-value of this resonance was typically 12000, which is about a factor of 2 higher than the Q-value of 6560 found for end faces covered with pure copper. From these resonators two-pole bandpass filters were constructed that at 77 K showed an insertion loss of -0.26 dB at their center frequency of 6.3 GHz. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 10518223
- Volume :
- 7
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Applied Superconductivity
- Publication Type :
- Academic Journal
- Accession number :
- 93047400
- Full Text :
- https://doi.org/10.1109/77.621815