Tire RFID tag with segmented dipole antenna
AssigneeSMARTRAC TECHNOLOGY GmbH
InventorsMichael Drubel, Frederic Meyer, Christoph Ohm
Life of this patent
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Abstract
Tuneable linear-antenna transponders and methods of making and using thereof are described herein. In some embodiments, the transponder includes two radiators formed of a conductive material, wherein the radiators may be identical or different. In some embodiments, the radiators are divided into a multitude of segments, wherein each segment is in the form of a linear segment or helical spring segment or cylindrical segment. In some embodiments, two of the consecutive segments are different in either shape and/or winding width of the helical spring. The distinct transmission line segments provide additional degrees of freedom, which enables finer/improved tunability of the antenna resonance.
Claims13
A RFID transponder device for integration into a tire, comprising:
- an IC chip with contacts and a dipole antenna connected to the IC chip, comprising two identical radiators out of a conductive material characterized by
- the radiators being divided into at least three segments,
- wherein each segment is one of linear form or helical spring form or cylindrical form and
- wherein two consecutive segments are different in either form or winding width of the helical spring form.
A RFID transponder device for integration into a tire, comprising:
- an IC chip attached to a primary antenna and a dipole antenna formed as a one-piece helical spring antenna, the dipole antenna capacitively or inductively connected to the IC chip by means of the primary antenna, the IC chip being located at half of the length of the antenna, characterized by
- the dipole antenna being divided into at least six segments and wherein two consecutive segments are different in winding width of the helical spring form.
A method for producing a RFID transponder device for integration into a tire, the method comprising:
- producing two identical radiators from a conductive material
- providing an IC chip suitable for Ultra-High-Frequency RFID, having two contacts for antennas
- attaching one of the two identical radiators to each of the contacts of the IC chip, so that the radiators are in electrical contact with the contacts of the IC chip characterized by
- forming the radiators from a wire or rod of the conductive material;
- dividing the radiators into at least three segments, wherein each segment is one of linear form or helical spring form or cylindrical form
- forming the segments such that two consecutive segments are different in either form or winding width of the helical spring form.
Dependencies are inferred from the claim text.