Antenna for Near Field Radio-Frequency Identification and Method and System for Use Thereof
First Claim
Patent Images
1. An apparatus comprising:
- a conductive thin material arranged in planar spiral, having an outer end and an inner end; and
a transmit/receive terminal positioned at said outer end to receive inbound and outbound RF signals.
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Abstract
An antenna array and method of operation are disclosed for providing a very thin antenna arrangement with large coverage area for RFID applications and long distance sensitivity. The antenna arrangement comprises two or more antenna elements, each element comprises a planar spiral of conductive material with a feed terminal at one end of the spiral and preferably at its outer end. Each adjacent couple of antenna elements may be arranged with the direction of rotation of their spiral being in opposite directions. Each antenna element may be fed with RFID signal independently from the other antenna elements and preferably the antenna elements are fed one at a time.
22 Citations
13 Claims
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1. An apparatus comprising:
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a conductive thin material arranged in planar spiral, having an outer end and an inner end; and a transmit/receive terminal positioned at said outer end to receive inbound and outbound RF signals. - View Dependent Claims (2, 3, 4)
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5. An antenna array comprising:
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a plurality of antenna apparatuses, each antenna apparatus comprising; a conductive thin material arranged in planar spiral, having an outer end and an inner end; and a transmit/receive terminal positioned at said outer end to receive inbound and outbound RF signals; wherein said plurality of antenna apparatuses are arranged in a quadrangle array, and wherein the direction of the spiral winding rotation in every pair of adjacent antenna apparatuses is inverted with respect to each-other. - View Dependent Claims (6, 7, 8)
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9. A method comprising:
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providing a RF signal to an antenna having a conductive thin material arranged in planar spiral, and a transmit/receive terminal at its outer end; receiving a response RF signal from a RFID tag; and sending said received response to a control unit. - View Dependent Claims (10)
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11. A method comprising:
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providing an array of plurality of antennas, each antenna having a conductive thin material arranged in planar spiral, and a transmit/receive terminal at its outer end and the direction of the spiral windings of every pair of adjacent antennas is inversed; providing a RF signal to each of said terminals separately according to a time sequence and receiving a RFID response; and presenting to a user an identification information based on an analysis of said received RFID response.
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12. A Radio Frequency Identification (RFID) system comprising:
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at least one array of antennas comprising; a plurality of antenna apparatuses, each antenna apparatus comprising; a conductive thin material arranged in planar spiral, having an outer end and an inner end; and a transmit/receive terminal positioned at said outer end to receive inbound and outbound RF signals; wherein said plurality of antenna apparatuses are arranged in a quadrangle array, and wherein the direction of the spiral winding rotation in every pair of adjacent antenna apparatuses is inverted with respect to each-other. a multi-way switch for each of said at least one array of antennas to provide RFID signal to at least one of said plurality of said antenna apparatuses; and a sequencer for each of said at least one array of antennas to control said providing of RFID signal to said at least one of said plurality of said antenna apparatuses. - View Dependent Claims (13)
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Specification