公开(公告)号：US12032044B2

公开(公告)日：2024-07-09

申请号：US17134589

申请日：2020-12-28

Applicant: Massachusetts Institute of Technology

Inventor： Danielle A. Braje ,  Jennifer Schloss ,  Linh M. Pham ,  John F. Barry ,  Erik R. Eisenach ,  Michael F. O'Keeffe ,  Jonah A. Majumder ,  Jessica Kedziora ,  Peter Moulton ,  Matthew Steinecker

IPC: G01R33/24 ,  H01P1/18 ,  H01P3/06 ,  H01P5/18 ,  H01P7/10 ,  H03B5/18

CPC classification number: G01R33/24 ,  H01P1/18 ,  H01P3/06 ,  H01P5/18 ,  H01P7/10 ,  H03B5/1864

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.