US 11,984,656 B2
RF tag antenna, RF tag, tire provided with RF tag, and tire with built-in RF tag
Shiro Sugimura, Kanazawa (JP)
Assigned to PHOENIX SOLUTION CO., LTD., Ishikawa (JP)
Appl. No. 17/278,909
Filed by PHOENIX SOLUTION CO., LTD., Kanazawa (JP)
PCT Filed Sep. 30, 2019, PCT No. PCT/JP2019/038534
§ 371(c)(1), (2) Date Mar. 23, 2021,
PCT Pub. No. WO2020/090319, PCT Pub. Date May 7, 2020.
Claims priority of application No. 2018-202604 (JP), filed on Oct. 29, 2018.
Prior Publication US 2022/0051069 A1, Feb. 17, 2022
Int. Cl. H01Q 1/48 (2006.01); G06K 19/077 (2006.01); H01Q 1/22 (2006.01); H01Q 1/50 (2006.01)
CPC H01Q 1/48 (2013.01) [G06K 19/07764 (2013.01); H01Q 1/2241 (2013.01); H01Q 1/50 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An RF tag antenna used by being attached to a tire including carbon powder and a steel wire,
the RF tag antenna comprising:
a ground part; and
a potential difference formation part that forms a potential difference with respect to the ground part, wherein
the potential difference formation part and the ground part are disposed opposite each other with a spacer containing an insulator in between,
a resonant circuit that resonates in a frequency band of radio waves to be received is formed by an inductance of the RF tag antenna and a capacitance of a capacitor formed by the potential difference formation part, the ground part, and the spacer, and
only the ground part has electrical continuity with the steel wire.