The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 09, 2024
Filed:
Dec. 28, 2020
Massachusetts Institute of Technology, Cambridge, MA (US);
Danielle A. Braje, Winchester, MA (US);
Jennifer Schloss, Cambridge, MA (US);
Linh M. Pham, Arlington, MA (US);
John F. Barry, Arlington, MA (US);
Erik R. Eisenach, Cambridge, MA (US);
Michael F. O'Keeffe, Medford, MA (US);
Jonah A. Majumder, Cambridge, MA (US);
Jessica Kedziora, Shirley, MA (US);
Peter Moulton, Concord, MA (US);
Matthew Steinecker, Medford, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
We have developed a high-performance, low-volume, low-weight, and low-power sensor based on a self-sustaining oscillator. The techniques described here may be used for sensing various fields; we demonstrate magnetic sensing. The oscillator is based on a dielectric resonator that contains paramagnetic defects and is connected to a sustaining amplifier in a feedback loop. The resonance frequency of the dielectric resonator shifts in response to changes in the magnetic field, resulting in a shift in the frequency of the self-sustaining oscillator. The value of the magnetic field is thereby encoded in the shift or modulation output of the self-sustaining oscillator. The sensor as demonstrated uses no optics, no input microwaves, and, not including digitization electronics, consumes less than 300 mW of power and exhibits a sensitivity at or below tens of pT/√{square root over (Hz)}. In some implementations, the sensor is less than 1 mL in volume.