Patent application number | Description | Published |
20080291106 | Crossed dual tag and RFID system using the crossed dual tag - A crossed dual tag includes two tags each of which comprises, on one plane, a dipole antenna formed with conductors, a feeding part to which an IC chip is connected at the center of the dipole antenna, and a loop-shaped inductance part that is formed between the dipoles of the dipole antenna and connected to the dipoles of the dipole antenna in parallel with respect to the feeding part. The two tags are crossed at right angles, and stacked to contact as closely as possible so that the loops of the inductance parts overlap as wide as possible. A reader/writer of an RFID system sequentially switches the surface of a circular polarized wave of a wireless signal between forward and backward directions, and reads information written to a user memory area from the tag that responds more strongly. | 11-27-2008 |
20090058658 | Tag Antenna and Tag - 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. | 03-05-2009 |
20090096701 | TAG-USE ANTENNA AND TAG USING THE SAME - 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 | 04-16-2009 |
20090160548 | POWER AMPLIFYING APPARATUS - A power amplifying apparatus includes a high-speed low pass filter which inputs an envelope signal included in a transmission signal therein, a low-speed low pass filter which inputs the envelope signal therein, a determination unit which inputs the envelope signal therein and determines rising or falling of the envelope signal, a selecting unit which selects one of the high-speed low pass filter and the low-speed low pass filter according to a determined result of the determination unit, and a voltage supply unit which generates a voltage based on a signal input according to a selection by the selecting unit and supplies the voltage to a power amplifier which inputs the transmission signal therein so as to amplify a power of the transmission signal. | 06-25-2009 |
20090273446 | Wireless tag and electrically conductive pipe having wireless tag - 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. | 11-05-2009 |
20090289795 | Container And Wireless Tag Reading System - The container for accommodating at least one article bearing a wireless tag that wirelessly communicates with a reader/writer antenna includes a conductor which electromagnetically couples with an antenna of the wireless tag when an interrogation signal is radiated from the reader/writer antenna toward the wireless tag or when a response signal is radiated from the wireless tag toward the reader/writer antenna. | 11-26-2009 |
20100072287 | Loop Antenna - 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. | 03-25-2010 |
20100073146 | Method Of Controlling Communication Frequencies Of Wireless Communication System, Controller Of The System, And Wireless Communication System - 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. | 03-25-2010 |
20100073249 | Aperture antenna - 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. | 03-25-2010 |
20100097191 | Wireless Tag And Method For Producing Wireless Tag - 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. | 04-22-2010 |
20100109874 | Tag Patch Antenna And RFID Tag Using Tag Patch Antenna - 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. | 05-06-2010 |
20100117833 | Radio Frequency Tag And Method Of Manufacturing The Same - 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. | 05-13-2010 |
20100123586 | RFID TAG AND MANUFACTURING METHOD OF RFID TAG - 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. | 05-20-2010 |
20100127085 | WIRELESS FREQUENCY TAG AND METHOD FOR MANUFACTURING WIRELESS FREQUENCY TAG - 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. | 05-27-2010 |
20100231474 | Metal Pipe Managed By Wireless Tag And Wireless Tag - 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. | 09-16-2010 |
20110068904 | RFID TAG - An RFID tag includes: a tabular dielectric member | 03-24-2011 |
20110284643 | RFID Tag And Manufacturing Method Thereof - An RFID tag having a tag antenna and an LSI chip, comprising: a power-supply pattern on which the LSI chip is mounted; a patch antenna that functions as the tag antenna; and a high-frequency connection section that makes a high-frequency connection between the power-supply pattern and the patch antenna. The high-frequency connection section is formed, for example, by forming a slot in the patch antenna, layering one end of a small dipole antenna that functions as the power-supply pattern over the slot so that it crosses over the slot, and supplying power from the smalI dipole antenna to the patch antenna. | 11-24-2011 |
20130147549 | AMPLIFIER - An amplifier includes a signal processing circuit configured to generate an orthogonal signal orthogonal to an input signal; a first D/A converter configured to convert the orthogonal signal into a first analog signal; a second D/A converter configured to convert the input signal into a second analog signal; and an analog computing circuit configured to generate a constant envelope signal based on the first analog signal from the first D/A converter and the second analog signal from the second D/A converter. | 06-13-2013 |