Electrotextile RFID antenna
First Claim
Patent Images
1. An apparatus comprising:
- a substrate;
an electrotextile antenna attached to the substrate, wherein the electrotextile antenna communicates with radio frequency identification (RFID) transponders, the electrotextile antenna comprising a conductive, metalized fabric including at least three different metals and that has a conductivity of between 1.0×
105 Siemens/meter and 5.0×
105 Siemens/meter, wherein the electrotextile antenna comprises conductive elements, wherein the conductive elements comprise;
two or more spatially separated conductive cell patches capactively coupled together;
a feed pad; and
one or more conductive feed lines comprising a strip connected to the feed pad, andwherein the one or more conductive feed lines are electrically coupled with the one or more conductive cell patches, creating a radiative pattern that reads RFID transponders in a corresponding interrogation zone.
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Abstract
A system for reading transponders may include a printed circuit board and an electrotextile antenna. The printed circuit board may include an RFID reading circuit, and the electrotextile antenna may be electrically connected to the printed circuit board via a connection. The electrotextile antenna may be composed of a material made by blending or coating textiles with a metal, and the electrotextile antenna may be configured to transmit and receive signals between the RFID reading circuit and RFID tags.
53 Citations
19 Claims
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1. An apparatus comprising:
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a substrate; an electrotextile antenna attached to the substrate, wherein the electrotextile antenna communicates with radio frequency identification (RFID) transponders, the electrotextile antenna comprising a conductive, metalized fabric including at least three different metals and that has a conductivity of between 1.0×
105 Siemens/meter and 5.0×
105 Siemens/meter, wherein the electrotextile antenna comprises conductive elements, wherein the conductive elements comprise;two or more spatially separated conductive cell patches capactively coupled together; a feed pad; and one or more conductive feed lines comprising a strip connected to the feed pad, and wherein the one or more conductive feed lines are electrically coupled with the one or more conductive cell patches, creating a radiative pattern that reads RFID transponders in a corresponding interrogation zone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for reading transponders, the system comprising:
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an RFID reading circuit; and a metamaterial electrotextile antenna comprising conductive elements on a substrate, wherein the electrotextile antenna comprises a conductive, metalized fabric that comprises at least three metals and has a conductivity of between 1.0×
105 Siemens/meter and 5.0×
105 Siemens/meter, wherein the electrotextile antenna comprises conductive elements and communicates with the RFID reading circuit and RFID tags, wherein the electrotextile antenna is electrically connected to the RFID reading circuit to read RFID transponders in a corresponding interrogation zone, wherein the conductive elements comprisetwo or more spatially separated conductive cell patches capactively coupled together; a feed pad; and one or more conductive feed lines comprising a strip connected to the feed pad; and wherein the one or more conductive feed lines are electrically coupled with the one or more conductive cell patches, creating a radiative pattern that reads the RFID transponders in a corresponding interrogation zone. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method of manufacture of an electrotextile RFID antenna comprising:
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blending or coating portions of a flexible textile material with at least three metals, resulting in electrotextile material having a conductivity of between 1.0×
105 Siemens/meter and 5.0×
105 Siemens/meter;forming an electrotextile antenna on a substrate with the electrotextile material, the antenna structure configured to communicate with RFID transponders, thereby forming an electrotextile antenna comprising two or more conductive cell patches capactively coupled together and one or more conductive feed lines; electrically coupling the one or more conductive feed lines with the one or more conductive cell patches creating a radiative pattern on the antenna from the coupling that reads RHD transponders in a corresponding interrogation zone; and electrically connecting a portion of the electrotextile antenna to an RFID circuit so that the electrotextile antenna transmits interrogation signals generated by the RFID circuit to the RFID transponders and receives response signals from the RFID transponders when reading RFID transponders in a corresponding interrogation zone. - View Dependent Claims (18, 19)
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Specification