Radio frequency identification (RFID) tag device and related methods
Implementations of antennas may include a meandering T-matching structure, a first meandering feed line coupled to the meandering T-matching structure, and a first radiating part coupled to the first meandering feed line. Implementations may include a second meandering feed line coupled to the meandering T-matching structure, and a second radiating part coupled to the meandering feed line. A gap may physically separate the first meandering feed line and the second meandering feed line.
1. An antenna comprising:
a meandering T-matching structure;
a first dipole arm comprising a first meandering feed line, the first dipole arm coupled to the meandering T-matching structure; and
a second dipole arm comprising a second meandering feed line, the second dipole arm coupled to the meandering T-matching structure.
2. The antenna of claim 1 , wherein the first meandering feed line comprises a first frequency-tuning stub.
3. The antenna of claim 2 , wherein the second meandering feed line comprises a second frequency-tuning stub.
4. The antenna of claim 1 , further comprising a first radiating part and a second radiating part.
5. The antenna of claim 1 , wherein a gap physically separates the first dipole arm from the second dipole arm.
6. A radio frequency identification (RFID) tag comprising:
a substrate comprising a first side and a second side;
an antenna coupled to the second side of the substrate, the antenna comprising a meandering T-matching structure coupled to a first dipole arm comprising a first meandering feed line and to a second dipole arm comprising a second meandering feed line; and
an integrated circuit coupled to the first side of the substrate.
7. The RFID tag of claim 6 , wherein the substrate is 3.2 millimeters thick.
8. The RFID tag of claim 6 , wherein the substrate is 1.6 millimeters thick.
9. The RFID tag of claim 6 , wherein the antenna comprises a first radiating part and a second radiating part.
10. The RFID tag of claim 6 , wherein the antenna comprises a first frequency tuning stub and a second frequency tuning stub.
11. The RFID tag of claim 6 , wherein a gap physically separates the first dipole arm from the second dipole arm.
12. The RFID tag of claim 11 , wherein the integrated circuit spans the gap.
13. A radio frequency identification (RFID) tag comprising:
a dielectric substrate comprising a first side and a second side;
an antenna coupled to the second side of the dielectric substrate, the antenna comprising:
a meandering T-matching structure;
a first dipole arm comprising a first meandering feed line, the first dipole arm coupled to the meandering T-matching structure; and
a second dipole arm comprising a second meandering feed line, the second dipole arm coupled to the meandering T-matching structure, wherein a gap physically separates the first dipole arm and the second dipole arm;
wherein the antenna is coupled to a metal exclusion region through a first via and a second via, the first via positioned at a first side of the gap and the second via positioned at a second side of the gap; and
an integrated circuit coupled to the dielectric substrate.
14. The RFID tag of claim 13 , wherein the integrated circuit is coupled to the first side of the dielectric substrate.
15. The RFID tag of claim 13 , wherein the integrated circuit is coupled to the second side of the dielectric substrate.
16. The RFID tag of claim 15 , wherein the integrated circuit spans the gap between the first meandering feed line and the second meandering feed line.
17. The RFID tag of claim 13 , wherein the antenna further comprises a first frequency tuning stub coupled to the first dipole arm.
18. The RFID tag of claim 17 , wherein the antenna further comprises a second frequency tuning stub coupled to the second dipole arm.
19. The RFID tag of claim 13 , wherein the dielectric substrate is 3.2 millimeters thick.
20. The RFID tag of claim 13 , wherein the dielectric substrate is 1.6 millimeters thick.