Abstract: The RFID tag is composed of the first antenna of metal film layer on which the IC chip is mounted and at least one second antenna of metal film layer on which the IC chip is not mounted The metal film layer is formed on the base, and the metal film layer is formed on the base. The metal film layer partially overlaps the metal film layer with the base interposed between them, so that the first antenna and the second antenna are capacitively coupled to each other.

Abstract: A small radio frequency IC tag which can obtain sufficiently long communication distance with radio wave in the microwave band even if an antenna is made small and the radio frequency IC tag is embedded in metal material. An O-shaped antenna is formed to narrow the width of a neck part in which an IC chip is mounted and widen the width of radiating electrodes constituting radiating part of radio wave. The radiating electrodes are formed into offset structure on right and left sides of the feeding point so that areas of right and left radiating parts of the feeding point in which the IC chip is mounted are unsymmetrical. Further, a ground electrode is provided so that a dielectric body is held between the radiating electrodes and the ground electrode and the radiating electrode is connected to the ground electrode at the side of the dielectric body.

Abstract: An IC chip and a minute antenna for conducting transmission with a weak radio wave are mounted on a male connector. An auxiliary antenna for amplifying the weak radio wave emitted by the minute antenna and transmitting the amplified radio wave is mounted on a female connector. If the male connector is fitted into the female connector normally, then the distance between the minute antenna and the auxiliary antenna becomes 1.0 mm or less, and consequently the weak radio wave transmitted by the minute antenna is amplified by the auxiliary antenna and transmitted to the outside. Unless fitting is conducted normally, then the distance between the minute antenna and the auxiliary antenna becomes longer than 1.0 mm, and consequently the weak radio wave emitted the minute antenna is not amplified and transmitted. By receiving the information stored on the IC chip, the fitting state of the connectors can be checked.

Abstract: A disk medium having an IC chip capable of delivering information to an external source contactlessly even if several media are stacked. In the disk medium, an annular slot constituting a non-film portion without metal film is formed close to the boundary between an information non-recording area and an information recording area. The area formed with the metal film is separated into an outer antenna portion and a second antenna portion. The second is a C-shaped member in which a central non-film area on the inner peripheral side and the annular slot are connected via a notch. Signal input/output electrodes constituting the terminals of the IC chip for supplying power to the antenna are connected to the metal films of the first and second antenna over the annular slot at a narrow portion.

Abstract: A 6 mm long and 1.5 wide antenna is evaporated on a surface of a 7 mm long and 2.4 mm wide inlet film, and a slit is formed in the antenna. An IC chip is mounted on the antenna over the slit like a bridge to configure an inlet. The inlet is wound on a 7 mm long shaft having a diameter of 0.8 mm in its longitudinal direction. The shaft with the inlet wound thereon is inserted in an inside of an 11 mm long outer coating cover having a diameter of 1 mm, the cover being made of resin. The cover with the shaft and the inlet therein is passed through a heater cylinder for fusion by heat, thereby providing the coating to the RFID tag. This results in a small bioimplant RFID tag.

Abstract: A RFID tag for accommodation in a narrow clearance in an electronic device and providing a predetermined communication distance even if a displacement occurs between first and second antennas. First antenna is mounted through first spacer to metal case surface and second antenna mounted to resin container surface facing the first antenna. The dielectric resin container functions as a second spacer. Only the first spacer and first antenna are accommodated in the narrow clearance between metal case and resin container, the tag can be mounted even in an electronic device with a small redundant space and small size. First antenna is shorter than second antenna so that a required communication distance may be obtained even if their relative position is changed.

Abstract: A first inlet is formed by patterning a first antenna mounting a first IC chip in a loop shape near in an external periphery area of an IC card, the card being structured by laminated both planes of the first inlet with outer package material such as PET. A compact inlet including a second antenna, a second IC chip and a matching circuit is attached to a top or bottom surface of the card, crossing at a right angle a portion of the first loop antenna. With this antenna layout, the second antenna can be made compact to 0.2 ? or shorter by using the first antenna as an auxiliary antenna, and the card can operate without interference between the first antenna and second antenna.

Abstract: A disk media has an IC chip which is mounted thereon at a boundary peripheral portion of a metal film layer formation region with respect to a metal film layer non-formation region. The IC chip is mounted on a top surface of the metal film layer. An “L”-shaped slit is formed in the metal film layer at the mount position of the IC chip while causing signal input/output electrodes of IC chip to be connected to portions of the metal film layer which are placed on the opposite sides of the slit. With such an arrangement, it is possible to use the metal film layer as an antenna of IC chip while enabling the impedance of IC chip to match the impedance of the antenna formed by the metal film layer.

Abstract: A radio frequency IC tag includes an antenna substrate accommodated on a bottom portion of an outer casing and an antenna radiation portion mounted on a surface of the antenna substrate. These parts are encapsulated by a sealing agent. An IC chip is disposed at a substantial center on a backside of the antenna substrate. A ground pattern connected to an electrode terminal of the IC chip is formed in an area, on which the IC chip is not mounted. A through electrode passes through the antenna substrate from its back surface to above its front surface at a position slightly offset from the center thereof. The through electrode is connected to the antenna radiation portion on the front surface and to the electrode terminal of the IC chip on the back surface.

Abstract: In a wireless IC tag, metallic antennas are deposited as thin films on the front and back surfaces of a spacer, made of a heat-resistant glass epoxy material having a desired dielectric constant, to form a first antenna and a second antenna. An IC chip is mounted in the center of the first antenna. The second antenna functions as an auxiliary antenna for resonating to a desired frequency of a transmission radio wave of the first antenna to strengthen the intensity of the radio wave. Accordingly, even when the IC tag is mounted to a cable or the like, the tag can be mounted in the interior of the enclosure of the cable and thus the radio wave intensity of the first antenna can be prevented from being weakened by a metallic member in the cable.

Abstract: A tablet PTP package contains a multiplicity of tablets by a resin PVC and a metal sheet such as an aluminum sheet. An elongate space pattern is formed in a part of the aluminum sheet on the lower surface of the package to form an island area constituting an antenna. A small radio IC inlet including an IC chip mounted on a small antenna is arranged on the reverse surface (upper surface of the package) of the portion of the aluminum sheet corresponding to the island area. The small radio IC inlet and the second antenna formed by the island area are electrostatically coupled to each other with the resin PVC as a dielectric member, and thus a RFID (radio frequency identification) tag is configured.

Abstract: An antenna apparatus which ensures a wide reading area on a reader antenna and a reading operability of information recorded in a small-sized radio frequency IC tag is provided. The apparatus includes an auxiliary antenna of ?/2 long disposed near to a radiating antenna of ?/2 long and including plural conductive elements in an array. When the IC tag approaches the auxiliary antenna, a subsidiary tuning circuit is formed between it and an inlet antenna of IC tag, so making tuning complementary to each other. The inlet antenna having an antenna length shorter than the tuning frequency can receive energy from the auxiliary antenna efficiently and is excited integrally with the auxiliary antenna to thereby spread a reading area by apparatus and increase the communication distance.

Abstract: A wireless IC tag includes an IC chip with a response circuit for receiving a signal sent from an interrogator and transmitting a response signal in response to the received signal, a rectangular antenna connected to the response circuit, a first protective material hard in nature for covering the IC chip, and a second protective material, softer than the first protective material, for covering at least a part of the antenna, and the antenna is formed in a laminated structure of a plurality of flat members different in toughness so as not to fracture even when the antenna is bent by external forces.

Abstract: A small radio frequency IC tag which can obtain sufficiently long communication distance with radio wave in the microwave band even if an antenna is made small and the radio frequency IC tag is embedded in metal material. An O-shaped antenna is formed to narrow the width of a neck part in which an IC chip is mounted and widen the width of radiating electrodes constituting radiating part of radio wave. The radiating electrodes are formed into offset structure on right and left sides of the feeding point so that areas of right and left radiating parts of the feeding point in which the IC chip is mounted are unsymmetrical. Further, a ground electrode is provided so that a dielectric body is held between the radiating electrodes and the ground electrode and the radiating electrode is connected to the ground electrode at the side of the dielectric body.

Abstract: The present invention provides a radio frequency IC tag which is excellent in weatherability, dustproofness waterproofness, static protection and the like and capable of making a communication distance long even though each antenna section is made small in configuration. A first antenna equipped with an IC chip is formed on an upper surface of a first spacer. A second antenna is formed on a lower surface of a top cover. A second spacer is shaped in hollow form. The first spacer and the top cover are disposed on both sides of the second spacer with the first antenna and the second antenna being opposite to each other. Each of the first spacer, the second spacer and the top cover is formed of a synthetic resin. Thus, the IC chip and each antenna section are not exposed to the outside and hence weatherability or the like is enhanced. A weak radio wave radiated from the first antenna can be transmitted with being amplified by amplifying action of the second antenna.

Abstract: A radio frequency IC tag has wide directivity and is rich in flexibility. A radiation conductor is formed on the entire surface of a dielectric formed of synthetic resin foam and a back conductor is formed on the entire back surface of the dielectric. An IC chip is mounted to the radiation conductor on the front side. An L-shaped slit is formed at the portion of the radiation conductor at which the IC chip is mounted. The radiation conductor and the back conductor have the same size or the size of the back conductor is not greater than twice the size of the radiation conductor.

Abstract: A connector device used for electrical connection between electrical devices, including: a first connector; an IC chip disposed in a casing of the first connector; a first antenna disposed in the casing of the first connector, for wirelessly transmitting ID data of the IC chip stored in the IC chip in response to a signal from an external device; a second connector detachable from the first connector, electrically connecting the electrical devices when coupled to the first connector; and a second antenna disposed in a casing of the second connector, brought close to the first antenna to amplify and transmit a radio wave from the first antenna, when the first and second connectors are normally coupled together.

Abstract: An IC chip and a minute antenna for conducting transmission with a weak radio wave are mounted on a male connector. An auxiliary antenna for amplifying the weak radio wave emitted by the minute antenna and transmitting the amplified radio wave is mounted on a female connector. If the male connector is fitted into the female connector normally, then the distance between the minute antenna and the auxiliary antenna becomes 1.0 mm or less, and consequently the weak radio wave transmitted by the minute antenna is amplified by the auxiliary antenna and transmitted to the outside. Unless fitting is conducted normally, then the distance between the minute antenna and the auxiliary antenna becomes longer than 1.0 mm, and consequently the weak radio wave emitted the minute antenna is not amplified and transmitted. By receiving the information stored on the IC chip, the fitting state of the connectors can be checked.

Abstract: A liquid crystal display with an IC tag in which information of an IC chip can be read from the surface of the liquid crystal display, while the IC chip can be mounted on the small-size liquid crystal display without lowering the attraction of design thereof. A common electrode is formed in a wide region of an upper electrode layer constituting the liquid crystal display. Antennas are formed in a region of an edge portion of the upper electrode layer where the common electrode is not formed, and within the region of a surface-side glass. An IC chip is placed out of the region of the surface-side glass. X-axis and Y-axis matrix electrodes are formed in a region of a lower electrode layer opposite to the common electrode.

Abstract: A radio frequency IC tag includes an antenna substrate accommodated on a bottom portion of an outer casing and an antenna radiation portion mounted on a surface of the antenna substrate. These parts are encapsulated by a sealing agent. An IC chip is disposed at a substantial center on a backside of the antenna substrate. A ground pattern connected to an electrode terminal of the IC chip is formed in an area, on which the IC chip is not mounted. A through electrode passes through the antenna substrate from its back surface to above its front surface at a position slightly offset from the center thereof. The through electrode is connected to the antenna radiation portion on the front surface and to the electrode terminal of the IC chip on the back surface.