RFID Shelf Antennas
First Claim
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1. A shelf antenna system for radio frequency identification (RFID) applications, the shelf antenna system comprising:
- a plurality of substantially horizontal shelves providing a plurality of shelf spaces above the plurality of substantially horizontal shelves, respectively; and
a first distributed antenna having a first feed terminal and a first plurality of radiating elements serially coupled to the first feed terminal, at least one of the first plurality of radiating elements being disposed in each of the plurality of shelf spaces,wherein the plurality of shelf spaces are covered by radiations from the first distributed antenna.
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Abstract
This invention provides a shelf antenna system for radio frequency identification (RFID) applications, the shelf antenna system comprises a plurality of substantially horizontal shelves, and a distributed antenna having a single feed terminal and a plurality of radiating elements, the distributed antenna being mounted next to the plurality of substantially horizontal shelves, wherein the entire shelf space of the plurality of substantially horizontal shelves are covered by radiations from the distributed antenna.
69 Citations
44 Claims
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1. A shelf antenna system for radio frequency identification (RFID) applications, the shelf antenna system comprising:
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a plurality of substantially horizontal shelves providing a plurality of shelf spaces above the plurality of substantially horizontal shelves, respectively; and a first distributed antenna having a first feed terminal and a first plurality of radiating elements serially coupled to the first feed terminal, at least one of the first plurality of radiating elements being disposed in each of the plurality of shelf spaces, wherein the plurality of shelf spaces are covered by radiations from the first distributed antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A shelf antenna system for radio frequency identification (RFID) applications, the shelf antenna system comprising:
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a plurality of substantially horizontal shelves providing a plurality of shelf spaces above the plurality of substantially horizontal shelves, respectively; and a first parallel-plate transmission line having a first feed terminal and a first plurality of radiating elements forming a first distributed antenna thereby, at least one of the first plurality of radiating elements being disposed in each of the plurality of shelf spaces, wherein the plurality of shelf spaces are covered by radiations from the first distributed antenna. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A shelf antenna system for radio frequency identification (RFID) applications, the shelf antenna system comprising:
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a plurality of substantially horizontal shelves providing a plurality of shelf spaces above the plurality of substantially horizontal shelves, respectively; a first parallel-plate transmission line having a first feed terminal and a first plurality of radiating elements; and a second parallel-plate transmission line having a second feed terminal and a second plurality of radiating elements, wherein the first and second feed terminals are connected together and at least one of the first and second plurality of radiating elements being disposed in each of the plurality of shelf spaces, so that the plurality of shelf spaces are covered by radiations from the shelf antenna system. - View Dependent Claims (39, 40, 41, 42, 43, 44)
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Specification