Superconducting control elements for RF antennas
US6335622B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1992 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Aug 25, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0036
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Control elements for RF antennas including high temperature superconducting capacitors, alone or in combination with other elements, including high temperature superconducting films, structures, and applications are formed. In one embodiment a high temperature superconducting capacitor is coupled to an inductor to form a resonant circuit. In another embodiment a high temperature superconducting capacitor is used to make a low-resistance cross-over for an inductor coil. Additional circuits include circuits which do not use non-superconducting materials in the circuit, circuits which have coupled superconducting inductors to provide low-loss signal coupling, tuning and bandwidth broadening, and circuits which include switches to shut off the superconductivity of a superconducting element including low-loss photoconducting and superconducting thermal switches. These circuits may be used to improve Magnetic Resonance Imaging (MRI).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.