Abstract: To provide a coil that has satisfactory characteristics even when the coil is used by being attached to or embedded in a tire, the coil forming an RFID tag in combination with a substrate on which an RF chip and a pattern coil connected to the RF chip are mounted. A coil 30 is held in a housing 75 accommodating a substrate 90 and is wound around the substrate 90. A first end of the coil 30 extends from the substrate 90 and forms a first element 50 of an antenna. A second end of the coil 30 extends from the substrate 90 and forms a second element 60 of the antenna. The first element 50 and the second element 60 are arranged in parallel to each other, and the first element 50 has a longer extension length than the second element 60. The coil 30 and a pattern coil 40 form a coupling transformer 20. The number of windings in the coil 30 is smaller than the number of windings in the pattern coil 40.

Abstract: [Problem] To provide: an RF tag antenna which is able to be fitted to a tire that contains a steel wire and a carbon powder; an RF tag; a tire which is provided with an RF tag; and a tire with a built-in RF tag. [Solution] An RF tag antenna 10 according to the present invention is used by being fitted to a tire 920 that contains a steel wire 925 and a carbon powder; and the RF tag antenna 10 comprises a ground part 30 and a potential difference formation part 20. The potential difference formation part 20 and the ground part 30 constitute a resonant circuit (LC); and the ground part 30 is electrically connected to the steel wire 925.

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: An RFID tag 300 with a boost antenna includes a boost antenna 100 and an RFID tag 200, wherein the boost antenna 100 includes: a radiation unit 10 which is conductive; a ground unit 30 which faces the radiation unit 10 and is conductive; and a short circuit unit 20 which connects one end of the radiation unit 10 and one end of the ground unit 30, and electrically connecting the radiation unit 10 and the ground unit 30 with each other, and wherein the RFID tag 200 is arranged at a position close to the short circuit unit 20 on the ground unit 30, wherein each of the boost antenna 100 and the RFID tag 200 has resonance characteristics.

Abstract: To provide a coil that has satisfactory characteristics even when the coil is used by being attached to or embedded in a tire, the coil forming an RFID tag in combination with a substrate on which an RF chip and a pattern coil connected to the RF chip are mounted. A coil 30 is held in a housing 75 accommodating a substrate 90 and is wound around the substrate 90. A first end of the coil 30 extends from the substrate 90 and forms a first element 50 of an antenna. A second end of the coil 30 extends from the substrate 90 and forms a second element 60 of the antenna. The first element 50 and the second element 60 are arranged in parallel to each other, and the first element 50 has a longer extension length than the second element 60. The coil 30 and a pattern coil 40 form a coupling transformer 20. The number of windings in the coil 30 is smaller than the number of windings in the pattern coil 40.

Abstract: An RFID tag 300 with a boost antenna includes a boost antenna 100 and an RFID tag 200, wherein the boost antenna 100 includes: a radiation unit 10 which is conductive; a ground unit 30 which faces the radiation unit 10 and is conductive; and a short circuit unit 20 which connects one end of the radiation unit 10 and one end of the ground unit 30, and electrically connecting the radiation unit 10 and the ground unit 30 with each other, and wherein the RFID tag 200 is arranged at a position close to the short circuit unit 20 on the ground unit 30, wherein each of the boost antenna 100 and the RFID tag 200 has resonance characteristics.

Abstract: [Problem] To provide: an RF tag antenna which is able to be fitted to a tire that contains a steel wire and a carbon powder; an RF tag; a tire which is provided with an RF tag; and a tire with a built-in RF tag. [Solution] An RF tag antenna 10 according to the present invention is used by being fitted to a tire 920 that contains a steel wire 925 and a carbon powder; and the RF tag antenna 10 comprises a ground part 30 and a potential difference formation part 20. The potential difference formation part 20 and the ground part 30 constitute a resonant circuit (LC); and the ground part 30 is electrically connected to the steel wire 925.

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: An RF tag has a particular structure of an RF tag antenna to which an IC chip is mounted. The RF tag antenna includes: an inductor pattern section having a C-shape and configured in a form of a flat plate; a notch section formed by cutting out a periphery of the inductor pattern section; an antenna section formed around the notch section; and a ground section provided in continuation with the inductor pattern section and configured in a form of a flat plate.

Abstract: [Problem] To provide: an RF tag antenna capable of achieving a low profile or receiving a non-directional radio wave; and a method for manufacturing an RF tag and the RF tag antenna. [Solution] This RF tag antenna 100 is adhered to a conductive member 900, and has a plate-shaped antenna unit and an inductor pattern L. The plate-shaped antenna unit receives a radio wave transmitted from a reading device, and comprises: a first waveguide element part 210 and a second waveguide element part 220 which are formed extending in the longitudinal direction; a first insulating base stacked on the first waveguide element part 210 and adhered to the conductive member 900; a power supply part 230 which electrically connects the first waveguide element part 210 and the second waveguide element part 220; and a short-circuiting part 240 which forms an electrical connection.

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 provide: an RF tag antenna that is non-directional and has a long communication range; an RF tag; and an RF tag having a conductive body formed therein. [Solution] This RF tag 100 is composed of an IC chip 500 and an RF tag antenna 110, and comprises: an inductor pattern part 150 having a C shape and configured in the shape of a flat plate; a notch part 170 formed by notching the vicinity of an inductor pattern part 140; an antenna part 120 formed in the vicinity of the notch part 170; and a ground part 130 provided continuous with the inductor pattern part 150 and configured in the shape of a flat plate.

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.

Abstract: An antenna of the present invention includes a laminate body including a conductor core, an insulator layer, and a conductor pattern. The conductor pattern is a conductor layer formed of a conducting body disposed on a radially outer side of the insulator layer. The conductor core and the conductor pattern are connected to each other in such a manner that a current is made to flow in a direction from the conductor core to the conductor pattern or in a direction opposite thereto so as to coincide with a power supply direction.

Abstract: An antenna of the present invention includes a laminate body including a conductor core, an insulator layer, and a conductor pattern. The conductor pattern is a conductor layer formed of a conducting body disposed on a radially outer side of the insulator layer. The conductor core and the conductor pattern are connected to each other in such a manner that a current is made to flow in a direction from the conductor core to the conductor pattern or in a direction opposite thereto so as to coincide with a power supply direction.