BROADBAND AC CURRENT SENSOR ON A THIN FERROMAGNETIC FILM Russian patent published in 2021 - IPC G01R15/18 G01R33/02 

FIELD: measuring technology.

SUBSTANCE: invention relates to measuring technology. A broadband AC current sensor on a thin ferromagnetic film contains a magnetic field sensor placed in an air gap of an annular core, through which at least one conductor with a current to be measured passes, and a compensation coil wound on the annular core. The novelty is that a highly sensitive broadband sensor of weak magnetic fields based on microstrip resonators with thin magnetic films is used as a magnetic field sensor, and the mode of compensation measurements of this sensor is realized due to feedback carried out using a compensation coil wound on a ring core, and its axis of sensitivity is directed tangentially to the circumference of the annular core.

EFFECT: invention provides an increase in the sensitivity of the device and an expansion of the frequency band.

1 cl, 2 dwg