Abstract
The use of rotational symmetric modes of superconductive disk (ring) resonators in order to increase the power handling capability of planar filters has been proposed. Several YBCO disk resonators on LaAlO3 and sapphire substrates have been measured as one- and two ports. The unloaded Q-factor of the resonators has been measured to be greater than 105 up to the oscillating power of 50 kW. Experimental results obtained show that a disk resonator can be used as a building block for low insertion loss, sharp skirt high-power planar filters at low GHz frequency range and temperatures of around 60 K.
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Kolesov, S., Chaloupka, H., Baumfalk, A. et al. Planar HTS structures for high-power applications in communication systems. J Supercond 10, 179–187 (1997). https://doi.org/10.1007/BF02770548
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DOI: https://doi.org/10.1007/BF02770548