Antenna system and method for determining a transit of a movable object through a detection plane
First Claim
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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Accused Products
Abstract
Embodiments relate to a concept for determining a transit of a movable object through a detection area within a detection plane. At least one exciter antenna provides an exciting electromagnetic field. The exciting electromagnetic field or at least one spatial component thereof has a field strength above a field strength threshold in the detection area. The exciting electromagnetic field is capable of exciting the movable object to emit an electromagnetic response signal comprising information on a position of the movable object. At least one sensor antenna comprising a magnetic core receives the electromagnetic response signal. 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 the at least one spatial component thereof is below the field strength threshold.
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Citations
14 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for determining a transit of a movable object through a detection area within a detection plane, the method comprising:
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providing, by means of at least one exciter antenna, an exciting electromagnetic field, wherein a spatial component of the exciting electromagnetic field perpendicular to the detection plane 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 receiving, by means of at least one sensor antenna comprising a magnetic core, 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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13. An antenna system for determining a transit of a movable object through a detection area within a detection plane, the antenna system comprising:
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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 at least one exciter antenna comprises a hollow electric current conductor, and wherein the at least one sensor antenna comprises the at least one magnetic core inside the hollow electric current conductor. - View Dependent Claims (14)
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Specification