Chain antenna system
First Claim
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1. A Radio Frequency Identification (RFID) system, comprising:
- a chain of radiating elements;
a transmission line; and
power dividers coupled along the transmission line, the power dividers coupling the transmission line to each of the radiating elements, the power dividers being configured such that each radiating element receives about a same amount of power from the transmission line,wherein at least one of the radiating elements has two portions coupled together with one or more resistors for introducing losses.
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Abstract
A Radio Frequency Identification (RFID) system according to one embodiment includes a chain of radiating elements; a transmission line; and power dividers coupled along the transmission line, the power dividers coupling the transmission line to each of the radiating elements, the power dividers being configured such that each radiating element receives about a same amount of power from the transmission line.
59 Citations
25 Claims
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1. A Radio Frequency Identification (RFID) system, comprising:
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a chain of radiating elements; a transmission line; and power dividers coupled along the transmission line, the power dividers coupling the transmission line to each of the radiating elements, the power dividers being configured such that each radiating element receives about a same amount of power from the transmission line, wherein at least one of the radiating elements has two portions coupled together with one or more resistors for introducing losses. - 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 Radio Frequency Identification (RFID) system, comprising:
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a chain of radiating elements; a transmission line; and power dividers coupled along the transmission line, the power dividers coupling the transmission line to each of the radiating elements, the power dividers being configured such that each radiating element receives about a same amount of power from the transmission line, wherein the radiating elements include linear polarized antennas, wherein at least some of the antennas have two portions coupled together with resistors for introducing losses.
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21. A Radio Frequency Identification (RFID) system, comprising:
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a chain of radiating elements, each radiating element having multiple portions; a transmission line; and power dividers coupled along the transmission line, each power divider being associated with at least one radiating element, the power dividers coupling the transmission line to each of the radiating elements, the power dividers being configured such that each radiating element receives about a same amount of power from the transmission line, wherein the portions of each of the radiating elements are on a common dielectric substrate, wherein each power dividers is on a dielectric substrate that is separate from the dielectric substrate of the associated radiating element. - View Dependent Claims (22, 23, 24, 25)
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Specification