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Anti-distortion electromagnetic sensor method and system

  • US 7,508,195 B2
  • Filed: 01/18/2007
  • Issued: 03/24/2009
  • Est. Priority Date: 01/18/2007
  • Status: Active Grant
First Claim
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1. A source for inducing an electromagnetic magnetic field, comprising:

  • a substrate;

    a conductive layer coupled to the substrate;

    a planar coil coupled to the substrate, wherein the planar coil comprises non-concentric rings, wherein the non-concentric rings are configured such that a drive current applied across the non-concentric rings provides a magnetic field, and wherein the magnetic field comprises a moment vector that is tilted at an angle from the normal to a plane of the planar coil; and

    a generally dipole wound coil, wherein the generally dipole wound coil is configured to modify the angle of the moment vector.

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