Single antenna arrangement providing interrogation field
First Claim
Patent Images
1. An antenna arrangement comprising:
- (i) a passageway having one or more sides; and
(ii) a single antenna for providing an interrogation field across said passagewaywherein the antenna is located in a substantially vertical plane of one of said sides, said antenna including at least one coil having at least one corner and an adjacent straight portion which is oriented at an acute angle to a floor surface of the passageway, andwherein said interrogation field is provided solely by said antenna.
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Abstract
An antenna arrangement includes a passageway having at least one side and an antenna located in a substantially vertical plane of the side. The antenna has one or more coils, each having a corner and adjacent straight portions oriented at an acute angle to a floor surface of the passageway. The acute angle is preferably 30° to floor surface.
27 Citations
24 Claims
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1. An antenna arrangement comprising:
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(i) a passageway having one or more sides; and (ii) a single antenna for providing an interrogation field across said passageway wherein the antenna is located in a substantially vertical plane of one of said sides, said antenna including at least one coil having at least one corner and an adjacent straight portion which is oriented at an acute angle to a floor surface of the passageway, and wherein said interrogation field is provided solely by said antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An antenna arrangement comprising:
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(i) a passageway having one or more sides; and (ii) a single antenna for providing an interrogation field across said passageway; wherein the antenna is located in a substantially vertical plane of one of said sides, said antenna including at least one coil having at least one corner and an adjacent straight portion oriented at an acute angle to a floor surface of the passageway, no substantial part of said at least one coil being horizontal or vertical; and wherein said interrogation field is provided solely by said antenna.
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18. An antenna arrangement comprising:
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(i) a passageway having one or more sides; and (ii) a single antenna for providing an interrogation field across said passageway; wherein the antenna is located in a substantially vertical plane of one of said sides, said antenna including at least one quadrilateral coil with no substantial part of said coil being horizontal or vertical; and wherein said interrogation field is provided solely by said antenna. - View Dependent Claims (19, 20, 21)
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22. An antenna arrangement comprising:
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(i) a passageway having one or more sides; and (ii) a single antenna for providing an interrogation field across said passageway; wherein the antenna is located in a substantially vertical plane of one of said sides, said antenna including at least one quadrilateral inner coil and at least one quadrilateral outer coil with no substantial part of said inner coil or said outer coil being horizontal or vertical; and wherein said interrogation field is provided solely by said antenna. - View Dependent Claims (23, 24)
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Specification