Drift stabilization of magnetically tunable filter by temperature regulation and mechanical isolation of elctromagnet coil
US8760236B2 · kind B2 · utility
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12References
20Claims
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Key dates
| Filing date | Jul 28, 2011 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Jun 10, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/218
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An electromagnet structure comprises a magnetic shell having a cavity, a magnetic pole located within the cavity and having a magnetic gap for focusing a magnetic field on a magnetically tunable filter, a conductive coil located within the cavity of the magnetic shell and forming multiple turns around the magnetic pole, and a heater located within the cavity of the magnetic shell and configured to maintain the conductive coil at a substantially constant temperature when the magnetically tunable filter is tuned to different frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.