Superconductive filter with capacitive patches providing reduced cross-coupling
US7437187B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2000 |
| Grant date | Oct 14, 2008 |
| Priority date | — |
| Expiry date | Oct 30, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P7/084
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A resonator of a planar circuit type is provided for receiving a signal from an input end and transmitting a signal to an output end. The resonator includes: (a) a dielectric substrate; (b) a ground plane including a layer of conductive material formed on the bottom surface of the substrate; (c) an inductor formed on the top surface of the substrate and connected to the input and output ends; and (d) a series capacitor connected in parallel to the inductor, wherein the series capacitor includes two patches of conductive material formed on the top surface of the substrate, each patch being connected to one respective end of the resonator. Each patch also forms a shunt capacitor with the ground plane, and the capacitance of the shunt capacitor constitutes the majority of capacitance between the ground plane and the end of the resonator that is connected to the patch. The conductive material may be a superconductor, including oxide superconductors. Filters utilizing multiple resonators of the invention are also described. The integration of the series and shunt capacitors results in a more compact resonator and filter layout, allows broader manufacturing tolerances, and allows for mor…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.