A long-distance radio frequency electronic identification tire structure is provided. When the production of the tire is completed and an electronic tag reading device is used for identification, an RFID chip of an ultra high frequency electronic tag of a main tire body receives and sends an electromagnetic wave signal generated by a far-field copper film antenna and the electronic tag reading device. The frequency band and the bandwidth of the electromagnetic wave signal are adjusted by a frequency band/bandwidth adjustment portion, and first and second field effect adjustment grooves of first and second field effect adjustment portions are configured to adjust the field effect when a tire bead bundle and a steel belt layer reflect the electromagnetic wave signal, so that the electronic tag reading device can read the identification code of the ultra high frequency electronic tag at a wide angle and a long distance.

The invention relates to a dipole antenna including first and second radiating elements electrically connected via a transition, said first and second elements being associated with a frequency f.sub.1 in a frequency band, a feeding point the feeding point and the reference point being respectively connected to a feeding conductor and a ground conductor of a feeding line, and a balun. The balun is formed by a slot arranged in the first radiating element, said slot having a short circuit at a first end and an open circuit at a second end next to the transition. The feeding point and the reference point are arranged on opposite sides of the slot.

The invention relates to a dipole antenna including first and second radiating elements electrically connected via a transition, said first and second elements being associated with a frequency f.sub.1 in a frequency band, a feeding point the feeding point and the reference point being respectively connected to a feeding conductor and a ground conductor of a feeding line, and a balun. The balun is formed by a slot arranged in the first radiating element, said slot having a short circuit at a first end and an open circuit at a second end next to the transition. The feeding point and the reference point are arranged on opposite sides of the slot.

A tracking system comprising: a transmitter configured to steer an RF beam across a detection range, a passive RFID tag configured to be enabled for locating substantially when located in the center of the RF beam of the transmitter, and an RFID reader configured to detect the tag 104 once enable.

A tracking system comprising: a transmitter configured to steer an RF beam across a detection range, a passive RFID tag configured to be enabled for locating substantially when located in the center of the RF beam of the transmitter, and an RFID reader configured to detect the tag 104 once enable.

An RFIC module is provided that includes a base material having a first face and a second face opposite to each other, an RFIC mounted above the first face of the base material, and RFIC-side terminal electrodes that are formed on the first face of the base material and are connected to the RFIC. An insulator film is formed on the surface of the RFIC-side terminal electrode, and conductor films facing the RFIC-side terminal electrode are formed on the insulator film. Moreover, additional capacitances are formed between the RFIC-side terminal electrodes and the conductor films.

An RFID tag includes a circuit board and a plurality of functional modules. The circuit board has an antenna conductor and a ground plane. On the circuit board, a control circuit and an RFID IC are mounted. The functional modules are connected to the circuit board. The circuit board includes a main part and an extended part. The main part includes a mounting plane for the control circuit and the ground plane. The extended part includes the antenna conductor and is integrated with the main part. The extended part and the antenna conductor are longer than one edge of the main part and disposed along the one edge.

An RFID tag includes a circuit board and a plurality of functional modules. The circuit board has an antenna conductor and a ground plane. On the circuit board, a control circuit and an RFID IC are mounted. The functional modules are connected to the circuit board. The circuit board includes a main part and an extended part. The main part includes a mounting plane for the control circuit and the ground plane. The extended part includes the antenna conductor and is integrated with the main part. The extended part and the antenna conductor are longer than one edge of the main part and disposed along the one edge.

A wireless communication device is provided for transmitting and receiving a high-frequency signal having a first frequency for communication is disclosed. The device includes a loop pattern having a first electrode and a second electrode as both ends, an antenna pattern, a third electrode capacitively coupled to the first electrode, and a fourth electrode capacitively coupled to the second electrode. The device includes an RFIC having a capacitive impedance at a second frequency higher than the first frequency, and a first current path and a second current path connected in parallel with each other between the third electrode and the fourth electrode. The RFIC is included in the first current path and the second current path has an inductive impedance at a second frequency.

An antenna pattern used in a UHF frequency band RFID inlay is provided with a substance; a dipole antenna formed from a metal foil upon the front surface of the substance; and a sub-element formed from a metal foil upon the back surface of the substance, wherein the dipole antenna is provided with a loop portion having a IC chip connecting portion; a pair of meanders configured to respectively extend from the loop portion so as to be line symmetrical; and capacitance hats, the sub-element has a pair of U-shapes, and a part of the sub-element overlaps with the dipole antenna through the substance.