MICROWAVE MAGNETIC SENSOR AND MEASUREMENT METHOD THEREFOR

Title:

MICROWAVE MAGNETIC SENSOR AND MEASUREMENT METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2023/151130

Kind Code:

A1

Abstract:

A microwave magnetic sensor, comprising two half-wavelength resonators (1) and a magnetoresistive element (2), wherein each half-wavelength resonator (1) is a transmission line; the length of each half-wavelength resonator is equal to half of the wavelength corresponding to a fundamental mode resonant frequency f0 of the half-wavelength resonator; the two half-wavelength resonators have the same length and the same fundamental mode resonant frequency f0; the magnetoresistive element (2) is located between the two half-wavelength resonators (1) and is symmetrically spaced apart from the two half-wavelength resonators (1) at equal intervals; the magnetoresistive element (2) and end portions of the two half-wavelength resonators (1) form a coupling capacitor CAP; and the two half-wavelength resonators (1) are coupled by means of the coupling capacitor CAP. By means of the microwave magnetic sensor, an external magnetic field is determined according to a change in a first resonant frequency of the microwave magnetic sensor. The resonant frequency of a resonant structure can be accurately measured, such that the microwave magnetic sensor has higher sensitivity and accuracy than existing magnetoresistive sensors based on a Wheatstone bridge.

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Inventors:

SINGH VINIT (CN)
CHEN LINFENG (CN)
CHEN JINHUA (US)
PAN FENG (CN)
WEJINYA UCHECHUKWU CHRIS (US)
LEE MIFFY (CN)
HAN MOUNTAIN (CN)

Application Number:

PCT/CN2022/077536

Publication Date:

August 17, 2023

Filing Date:

February 23, 2022

Export Citation:

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Assignee:

HUZHOU JOUKING ELECTRONIC CO LTD (CN)

International Classes:

G01R33/09; G01R33/12

Foreign References:

US5985162A	1999-11-16
CN202837524U	2013-03-27
CN101738587A	2010-06-16
CN113567898A	2021-10-29
CN111323737A	2020-06-23
CN110501659A	2019-11-26
US20060221507A1	2006-10-05

Attorney, Agent or Firm:

HANGZHOU YUCHENG PATENT AGENCY (GENERAL PARTNERSHIP) (CN)

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