Detecting very low frequency magnetic fields based on precession modulation of magnetic field sensors
US11821965B2 · kind B2 · utility
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Key dates
| Filing date | May 20, 2021 |
| Grant date | Nov 21, 2023 |
| Priority date | — |
| Expiry date | Sep 22, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A very low frequency (VLF) magnetic field sensor, using spins sourced from insulating ferrimagnetic materials or ferrites, which can achieve high sensitivities competitive with modern sensors while simultaneously maintaining a small size, low power consumption, simplicity of design, and low cost. The magnetic field sensor utilizes nonlinear resonant precession modulation (RPM) dynamics of subatomic spins to attain parametric amplification of a magnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.