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US 5,512,824 AGranted
Magnetic field probe including symmetrical planar loops for eliminating the current induced by the E-field
OwnerZdenek (Danny) Adler, Refael Popovichinventors
Life of this patent
Estimating the term…
Abstract
An H-field probe for a radiation measuring system includes pairs of symmetrical planar magnetic loops for detecting electromagnetic (EM) radiation. EM radiation induces E-field and H-field currents in the loops. The individual loops of each pair are electrically coupled such that the E-field induced currents cancel while the H-field induced currents combine. The symmetrical construction results in virtually complete discrimination of the E-field.
Claims20
A magnetic field probe comprising:
- first and second symmetrical electrical loops mounted in close proximity defining a symmetric loop pair in a fixed relationship to each other;
- means for electrically coupling said loops such that:
- a current induced in said first loop from exposure of said loop pair to an electric field is offset by the current induced in said second loop from exposure of said loop pair to the electric field;
- and
- a current induced in said first loop from exposure of said loop pair to a magnetic field is combined with the current induced in said second loop from exposure of said loop pair to the magnetic field;
- and
- lead means for measuring the current induced in said loop pair from exposure of said loop pair to an electromagnetic field whereby the measurement is substantially equal to the amount of current induced by the magnetic field portion of the electromagnetic field.
4 more elements
A radiation measuring system comprising:
- a probe including:
- first and second symmetrical electrical loops mounted in close proximity defining a symmetric loop pair in a fixed relationship to each other;
- means for electrically coupling said loops such that:
- a current induced in said first loop from exposure of said loop pair to an electric field is offset by the current induced in said second loop from exposure of said loop pair to the electric field;
- and
- a current induced in said first loop from exposure of said loop pair to a magnetic field is combined with the current induced in said second loop from exposure of said loop pair to the magnetic field;
- and
- lead means for measuring the current induced in said loop pair from exposure of said loop pair to an electromagnetic field whereby the measurement is substantially equal to the amount of current induced by the magnetic field portion of the electromagnetic field;
- and
- a radiation meter coupled with said lead means of said probe.
7 more elements
Dependencies are inferred from the claim text.