Transparent radio frequency identification transponder
View Patent ↗A radio frequency identification (RFID) transponder that includes an RFID chip, a loop that is electrically connected to the RFID chip, and a substantially transparent antenna coupled to the loop. In various embodiments, the RFID transponder can be affixed over a light source (e.g., vehicle headlights) while preserving the luminance from the light source. Alternately or in addition, the RFID transponder can be affixed to a surface (e.g., product packaging, license plates) without obscuring any marks, designs, motifs, and/or text on the surface.
1. A radio frequency identification (RFID) transponder, comprising:
an RFID chip;
a loop that is electrically connected to the RFID chip; and
a substantially transparent antenna coupled to the loop, wherein the loop is deposited directly on top of the antenna and overlaps with the antenna.
2. The RFID transponder of claim 1 , wherein the RFID chip comprises an ultra-high frequency (UHF) RFID chip.
3. The RFID transponder of claim 1 , wherein the RFID chip comprises a high-frequency (HF) or a near field communication (NFC) chip.
4. The RFID transponder of claim 1 , wherein the RFID chip is adapted to support a plurality of frequencies.
5. The RFID transponder of claim 1 , wherein the loop comprises a substantially transparent material.
6. The RFID transponder of claim 1 , wherein the loop comprises a substantially opaque material.
7. The RFID transponder of claim 1 , wherein the antenna comprises conductive mesh.
8. The RFID transponder of claim 7 , wherein the conductive mesh comprises coated silver mesh.
9. The RFID transponder of claim 7 , wherein the conductive mesh comprises physical vapor deposited copper.
10. The RFID transponder of claim 7 , wherein the conductive mesh is deposited using one of the following: ink jet printing, offset printing, and lithography.
11. The RFID transponder of claim 7 , wherein the conductive mesh is deposited via chemical vapor.
12. The RFID transponder of claim 7 , wherein the conductive mesh is created subtractively from a solid film.
13. The RFID transponder of claim 7 , wherein the conductive mesh comprises transparent conductors.
14. The RFID transponder of claim 1 , wherein the antenna comprises a plurality of transparent conductors.
15. The RFID transponder of claim 14 , wherein the plurality of transparent conductors comprises at least one conductor constructed from poly (3, 4-ethylenedioxythiophene) (PEDOT).
16. The RFID transponder of claim 14 , wherein the plurality of transparent conductors comprises at least one conductor constructed from indium tin oxide (ITO).
17. An on-metal RFID transponder tag comprising:
the RFID transponder comprising:
an RFID chip;
a loop that is electrically connected to the RFID chip; and
a substantially transparent antenna coupled to the loop, wherein the loop is deposited directly on top of the antenna and overlaps with the antenna;
a conductive first layer comprising conductive mesh; and
a second layer comprising an insulator and positioned between the RFID transponder and the first layer comprising the conductive mesh.
18. The on-metal RFID transponder tag of claim 17 , further comprising a conductive third layer comprising conductive mesh, wherein the conductive third layer is a protective layer deposited over the RFID transponder.
19. The on-metal RFID transponder tag of claim 17 , further comprising a fourth layer comprising an adhesive.
20. The on-metal RFID transponder of claim 19 , further comprising a fifth layer comprising a liner.
21. The on-metal RFID transponder tag of claim 18 , wherein the conductive third layer is positioned on a side of the RFID transponder opposite to the conductive first layer and the second layer.
22. The on-metal RFID transponder tag of claim 18 , wherein both the conductive first layer and the conductive third layer are transparent layers.