Abstract: An RFID tag 1 for a rubber product is provided with a coupling transformer 40, an RF chip 10 connected to a secondary side of the coupling transformer, a printed circuit board 20 on which the RF chip is mounted, and an antenna 30, wherein the antenna comprises a coil section 31, a first element 32 extending from one end of the coil section, and a second element 33 extending from another end of the coil section in parallel with the first element and shorter than the first element, the coil section has fewer windings than the coupling transformer 40 on the secondary side, and the printed circuit board 20 is held in a gap between strands of the coil section such that the coil section forms a primary side of the coupling transformer.

Abstract: [Problem] To provide an antenna for an RF tag and an RF tag with which a communication distance between reading devices can be extended. [Solution] This antenna for an RF tag is provided with: an insulation member 40; a waveguide element 20 provided on one side of the insulation member 40; a waveguide element 30 disposed so as to face the waveguide element 20 and provided on the other side of the insulation member 40; a power supply unit 50 having one end electrically connected to the waveguide element 30; and a short-circuit unit 60 having one end electrically connected to the wave guide element 20 and the other end electrically connected to the waveguide element 30, wherein the permittivity of an insulation region A1 on the waveguide element 20 side among regions sandwiched between the waveguide element 20 and the waveguide element 30 is different from the permittivity of an insulation region A2 on the waveguide element 30 side among said regions.

Abstract: There is provided an RF tag that can be mounted in a cavity of a member formed of a conductor having the cavity therein, and has high communication performance. An RF tag 1 of the present invention is an RF tag that is mounted in a cavity 101 of a conductor-made member 100 having the cavity 101 therein, and includes at least a free space antenna 10, a resonance circuit 20, an IC chip 30, a closed space antenna 40, and a substrate 50 for supporting the closed space antenna, a portion of the free space antenna is exposed from the cavity to the outside, and the substrate supports the closed space antenna so that the closed space antenna is not in contact with the inner surface of the conductor-made member. The closed space antenna, the substrate and the conductor-made member forms a capacitor portion C2.

Abstract: [Problem] To provide an antenna for an RF tag and an RF tag with which a communication distance between reading devices can be extended. [Solution] This antenna for an RF tag is provided with: an insulation member 40; a waveguide element 20 provided on one side of the insulation member 40; a waveguide element 30 disposed so as to face the waveguide element 20 and provided on the other side of the insulation member 40; a power supply unit 50 having one end electrically connected to the waveguide element 30; and a short-circuit unit 60 having one end electrically connected to the wave guide element 20 and the other end electrically connected to the waveguide element 30, wherein the permittivity of an insulation region A1 on the waveguide element 20 side among regions sandwiched between the waveguide element 20 and the waveguide element 30 is different from the permittivity of an insulation region A2 on the waveguide element 30 side among said regions.

Abstract: There is provided an RF tag that can be mounted in a cavity of a member formed of a conductor having the cavity therein, and has high communication performance. An RF tag 1 of the present invention is an RF tag that is mounted in a cavity 101 of a conductor-made member 100 having the cavity 101 therein, and includes at least a free space antenna 10, a resonance circuit 20, an IC chip 30, a closed space antenna 40, and a substrate 50 for supporting the closed space antenna, a portion of the free space antenna is exposed from the cavity to the outside, and the substrate supports the closed space antenna so that the closed space antenna is not in contact with the inner surface of the conductor-made member. The closed space antenna, the substrate and the conductor-made member forms a capacitor portion C2.

Abstract: [Problem to be Solved] To provide an RF tag antenna capable of improving readability and a method of manufacturing the same, and an RF tag.

Abstract: [Problem to be Solved] To provide an RF tag antenna capable of improving readability and a method of manufacturing the same, and an RF tag.

Abstract: [Problem to be Solved] To provide an RF tag antenna capable of improving readability and a method of manufacturing the same, and an RF tag.

Abstract: [Problem to be Solved] To provide an RF tag antenna capable of improving readability and a method of manufacturing the same, and an RF tag.