Properties of Disk Resonators and End-Coupled Disk Filters with Superconducting Films
- 1 December 1993
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 32 (12R)
- https://doi.org/10.1143/jjap.32.5527
Abstract
We report the properties of disk resonators and end-coupled disk filters. High quality factors of 60,000 at 3 GHz and 27,000 at 7 GHz, respectively corresponding to TM11 and TM31 modes, were confirmed in a Nb disk resonator with a diameter of 18 mm on a sapphire substrate. End-coupled three-pole disk filters were also fabricated using the 7-mm-diameter Nb disks (TM11 mode). The disk filter with frequency of 7.5 GHz, fractional bandwidth of less than 1%, and insertion loss of less than 0.7 dB exhibited higher power handling capability of up to 22.5 dBm (180 mW). This high capability is thought to be achieved by reducing the current concentration at the edges of each resonators.Keywords
This publication has 9 references indexed in Scilit:
- The High Temperature Superconductivity Space Experiment: HTSSE I-Components and HTSSE II-Subsystems and advanced devicesIEEE Transactions on Applied Superconductivity, 1993
- 1.5-GHz Band-Pass Microstrip Filters Fabricated Using EuBaCuO Superconducting FilmsJapanese Journal of Applied Physics, 1993
- 55 GHz microstrip bandpass filter made from YBa2Cu3O7−x superconductor thin filmApplied Physics Letters, 1992
- Low- and high-temperature superconducting microwave filtersIEEE Transactions on Microwave Theory and Techniques, 1991
- Relative permittivity and dielectric loss tangent of substrate materials for high-T c superconducting filmJournal of Superconductivity, 1991
- Properties of Superconductive Strip-line Resonators Fabricated Using EuBaCuO Films on MgO (100)Japanese Journal of Applied Physics, 1991
- Measured performance at 77 K of superconducting microstrip resonators and filtersIEEE Transactions on Microwave Theory and Techniques, 1991
- Experimental observation of fundamental microwave absorption in high-quality dielectric crystalsPhysics Letters A, 1987
- Direct-Coupled-Resonator FiltersProceedings of the IRE, 1957