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Antenna system and method for determining a transit of a movable object through a detection plane

  • US 9,795,829 B2
  • Filed: 06/06/2014
  • Issued: 10/24/2017
  • Est. Priority Date: 06/12/2013
  • Status: Active Grant
First Claim
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1. An antenna system for determining a transit of a movable object through a detection area within a detection plane, the antenna system comprising:

  • at least one exciter antenna configured to provide an exciting electromagnetic field, wherein the exciting electromagnetic field or at least one spatial component has a field strength above a field strength threshold in the detection area, wherein the exciting electromagnetic field is capable of exciting the movable object to emit an electromagnetic response signal; and

    at least one magnetic core of a sensor antenna for receiving the electromagnetic response signal, wherein the at least one magnetic core is positioned in a region of the exciting electromagnetic field where the field strength of the exciting electromagnetic field or at least one spatial component thereof is below the field strength threshold;

    wherein the region of the exciting electromagnetic field having a field strength below the field strength threshold is a region of destructive superposition of electromagnetic field components originating from one or more electrical conductors of the exciter loop antenna.

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