Abstract: A wireless tag adapted for mounting inside a hollow electrically conductive pipe, includes: a contact placed in contact with the electrically conductive pipe so as to be electrically connected to the electrically conductive pipe; a lead wire placed inside the electrically conductive pipe along a longitudinal direction of the electrically conductive pipe and spaced a prescribed distance away from an inside wall of the electrically conductive pipe, thereby forming a coaxial line together with the electrically conductive pipe; and a wireless tag circuit, electrically connected at one end to the contact and at the other end to the lead wire, for generating a response signal in response to an interrogation signal transmitted from a reader/writer.

Abstract: The present invention relates to a tag-use antenna allowing a miniaturization while maintaining a constant minimal change of a communication distance. The tag-use antenna has a feed part of a folded dipole antenna of a size of 53 mm long and 7 mm wide being connected to, and equipped with, an LSI chip of Rc=500 ohms and Cc=1.4 pF and is covered with plastic resin 13 of the dielectric constant ?r=3 and thickness of t=0.75 mm on both sides of the antenna. The dipole part of 1 mm wire path width of the tag-use antenna is formed in a rectangular spiral by being bent inward from both ends at bending parts at four places. The entire length of the dipole antenna when extending the four bending parts straight is featured so as to be shorter than one half of a resonance wavelength of the antenna. An inductance part is formed in the neighborhood of the center of the dipole antenna, and placed in the middle of the dipole antenna, which is formed in said rectangular spiral, of the dipole antenna.

Abstract: An RFID tag includes a dielectric member, an antenna pattern formed on and around a surface of the dielectric member, and an IC chip that is electrically connected to the antenna pattern by means of two chip pads.

Abstract: An RFID tag includes: a tabular dielectric member 11; an antenna pattern 12 that extends over a top surface and an undersurface of the dielectric member and forms a loop antenna L1 having both ends existing on one surface of the top surface and the undersurface; a circuit chip 13 that is electrically connected to the antenna pattern; a first electrode 14 that is connected directly or via a conductor to one end 12a of the both ends of the loop antenna and spreads on the one surface of the top surface and the undersurface; and a second electrode 15 that is connected via a conductor to the other end 12b of the both ends of the loop antenna and spreads on the other surface of the top surface and the undersurface, along the first electrode 14.

Abstract: An RF tag includes a first transmission line which is connected to a grounding conductor and forms an electric closed loop to constitute a dipole antenna. A power supply circuit is connected between a branch point on the first transmission line and the grounding conductor. A second transmission line is connected to the branch point and arranged in parallel with the power supply circuit to constitute an inductor.

Abstract: A tag device that performs high-quality radio communication without radio wave radiation or receiving characteristics being deteriorated near a person's body and without hindering communication by another IC tag. A main loop section sends and receives radio waves. The main loop section is a metal foil and has the shape of a long thin loop. The area of the main loop section is smaller than the area of a dielectric substrate. The main loop section covers part of surfaces of the dielectric substrate and part of sides of the dielectric substrate so as to put the dielectric substrate inside the loop. The main loop section is mounted in a horizontal direction of the dielectric substrate. Each of capacitive load sections is a metal foil and has a load corresponding to a capacitance component.

Abstract: A tag antenna is composed of a dielectric spacer, and an antenna pattern which is formed on one of surfaces of the spacer and has a size smaller than one half of a wavelength at an operating frequency, and in which a slit pattern suitable for the resistance and the capacitive components of a chip to be mounted is formed.

Abstract: A loop antenna includes a dielectric substrate taking a cuboid form, and a loop part composed of a metal that covers two pairs of facing surfaces of the dielectric substrate. The loop part is formed by leaving a blank portion at the center of one surface of the pair of facing surfaces having a wider area. In the blank portion, a feeding point to an LSI chip and a capacitance part connected to the loop part in parallel to the feeding point are formed. The capacitance part is provided to compensate for an internal capacitance of the LSI chip so that a small LSI chip matches the antenna. A convex part having a length is arranged with a gap within a corresponding concave part to form a large capacitance.

Abstract: A metal pipe includes a slot having a predetermined length in a longitudinal direction of the metal pipe and a wireless tag that is placed inside the metal pipe and includes a power feeding unit to feed electric power to the slot and an IC chip connected to the power feeding unit, thereby functioning as an antenna of the wireless tag. The metal pipe is thus managed by the wireless tag.

Abstract: An antenna line is configured with a conductor line that meanders in a shape where a plurality of lines of the same shape, which are bent only at an obtuse angle, are provided in sequence.

Abstract: A wireless frequency tag includes a loop-shaped antenna pattern that is electrically connected to a chip connecting section, and a conducting member that electrically couples a part of the antenna pattern.

Abstract: The present invention relates to a RFID (Radio Frequency IDentification) tag for exchanging information with an external device in a non-contact manner, and aims to provide a RFID tag having an external shape of a belt, which fits articles made of various kinds of materials. The RFID tag includes: an inlay having an antenna and a circuit chip incorporating a communication circuit for wireless communications via the antenna, an enclosure that encloses the inlay, a flexible belt that surrounds an article to attach the enclosure to the article, and a spacer fixed to a surface of the enclosure on the article side, deforming in response to deformation of the belt to maintain a spacing between the article and the enclosure.

Abstract: A metal-resistant radio frequency tag that has a broader band pass band (frequency versus communication range) characteristic compared to conventional techniques is achieved. For this purpose, the radio frequency tag according to the present invention includes a first resonator pattern, the first resonator pattern including a chip connecting section to which a chip is to be connected, and an inductance section that is capable of adjusting an impedance matching with the chip; and a second resonator pattern that is fed through electromagnetic induction coupling via the inductance section.

Abstract: A tag patch antenna includes: a slit formed in the vicinity of an edge of an antenna pattern along a part of the edge; and a feeding point to which a tag LSI is connected and which is formed by cutting an intermediate portion of the part of the edge separated by the slit from a body of the antenna pattern by a width of the slit.

Abstract: The wireless tag includes an antenna conductor; a first power-supply conductor which is electromagnetic-inductively coupled with the antenna conductor; and a second power-supply conductor which is loop-shaped and which is electrically coupled with the first power-supply conductor.

Abstract: An apparatus performing wireless communication with a group of a plurality of base station antennas disposed on a wireless base station apparatus side in accordance with a multi-input multi-output wireless communication system includes a group of a plurality of repeater antennas disposed around the body of a user. The apparatus further includes a repeater base apparatus being connected to the group of the repeater antennas, communicating, with a handheld mobile terminal apparatus carried by the user, transmission/reception data in the handheld mobile terminal apparatus in accordance with a short-distance wireless communication system, and communicating, between the group of the plurality of the repeater antennas and the group of the base station antennas, the transmission/reception data in accordance with the multi-input multi-output wireless communication method.

Abstract: A loop antenna includes a dielectric substrate taking a cuboid form, and a loop part composed of a metal that covers two pairs of facing surfaces of the dielectric substrate. The loop part is formed by leaving a blank portion at the center of one surface of the pair of facing surfaces having a wider area. In the blank portion, a feeding point to an LSI chip and a capacitance part connected to the loop part in parallel to the feeding point are formed. The capacitance part is provided to compensate for an internal capacitance of the LSI chip so that a small LSI chip matches the antenna. A convex part having a length is arranged with a gap within a corresponding concave part to form a large capacitance.

Abstract: An aperture antenna includes an outer conductor with substantially fixed inner diameter; and an inner conductor, an end thereof receding from an aperture of the outer conductor in a direction of electromagnetic radiation.

Abstract: The wireless communication system sets at least one of the multiple wireless frequencies as a reception frequency from the wireless tag, and controls the temperature of a superconducting filter in response to the selected reception frequency, thereby the pass band or the rejection band of the superconducting filter is controlled.

Abstract: A tag antenna which, within a limited area, resonates with an RFID LSI chip having a capacitance component, and an RFID tag on which such a tag antenna is mounted, and which has an antenna and an LSI chip connected in parallel to the antenna are disclosed; the antenna has a feed terminal connected to the LSI chip, a loop antenna connected to the feed terminal, and a bypass conducting path which bypasses the loop of the loop antenna.