SHIELDING OF A UNIFORM ALTERNATING MAGNETIC FIELD USING A CIRCULAR PASSIVE LOOP

SHIELDING OF A UNIFORM ALTERNATING MAGNETIC FIELD USING A CIRCULAR PASSIVE LOOP

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The magnetic and electromagnetic shields are used to reduce the magnetic field in local spaces.Usually these shields are implemented in the form of a box or a cylinder.At the same time the magnetic field reduction in local spaces by means of passive loops is not considered in detail yet.So, the present study considers shielding capabilities of a circular passive loop.The authors invertatop squeeze bottle have performed an analytical and numerical modeling of a process of a uniform harmonic magnetic field shielding.

The simulated results permit to find out the spatial distribution of the shielded magnetic field.Dependencies of shielding effectiveness on the passive loop radius and cross-section are determined.Moreover, the non-monotonic behavior of the loop radius dependence is shown.We have substantiated that the shielded volume of a circular passive loop is advisable to limit by the sphere with a half loop radius.Presented results give parameters of the circular passive loop that reduces click here the rms value of the magnetic flux density by 30 %.