Abstract: A sheet with a built-in IC chip in which mechanical external forces do not significantly impinge on the IC chip and the IC chip does not separate or become damaged, and a tape with a built-in IC chip used for the sheet with a built-in IC chip. In the tape with a built-in IC chip, a part or all of the IC chip is embedded in a tape body.

Abstract: The present invention relates to a sheet with at least one built-in IC chip, the sheet being scarcely influenced by a mechanical external force and being free from loss or damage of the IC chip, and relates to a tape with at least one built-in IC chip used for the sheet with at least one built-in IC chip. The tape with at least one built-in IC chip is characterized in that a part or all of the IC chip 10 is embedded in a recessed portion 20a formed on a tape body, and the tape body 20 includes: a first base material 21; an adhesive layer 22 laminated on the first base material and formed of an adhesive; and a second base material 23 laminated on the adhesive layer; the second base material 23 being removed from the recessed portion 20a and the periphery thereof, and the adhesive in the recessed portion 20a of the adhesive layer 22 being pushed to the periphery thereof, and the pushed adhesive filling in a gap between the periphery of the IC chip 10 and the second base material 23.

Abstract: The capacitance of a smoothing capacitor is reduced, and the size of an IC chip is minimized. A series transistor is provided on the output side of a diode which rectifies the output voltage of an antenna, and the smoothing capacitor is connected to the base of the series transistor. If the current gain of the series transistor T is ?, then the apparent capacitance of the smoothing capacitor C2 is multiplied by ?.

Abstract: In order to eliminate limitation upon the frequency of a carrier wave from externally, this IC chip for identification includes: a power supply section which receives this carrier wave from outside and creates an internal power supply; a clock signal generation section for read out which generates an internal clock signal for read out based upon a clock signal pulse which is superimposed upon an optical signal from externally; a memory section; and an output section which serially reads out data in the memory section according to the internal clock signal for read out, and load modulates the carrier wave from outside based thereupon.

Abstract: Restrictions on the frequency of a carrier signal are removed. This invention comprises a power section for receiving the carrier signal and creating an internal voltage, a clock-generating section for creating an internal clock based on a clock pulse that is carried by the carrier signal, a memory section, a writing section for storing data that is carried on an optical signal in the memory section, and an output section for reading the data in the memory and load-modulating the carrier signal.

Abstract: An antenna includes a plurality of bases stacked in a thickness direction, conductor patterns formed on the bases, respectively, and conducting sections for electrically interconnecting the conductor patterns. The conductor patterns form inductance components and capacitance components.

Abstract: A compact antenna enabling to produce high gain is based on an antenna main body is constructed in such a way that a plurality of resonance sections, each having parallel-connected respective inductance sections and capacitance sections, are electrically connected in series, and a frequency adjusting capacitance section is connected electrically in series between a ground section at the ground potential and an exit end of the antenna main body. The resonance sections are constructed so that that the characteristic frequency curves overlap one another at least in the width portion to enable the antenna man body as a whole to resonate at substantially one resonance frequency, which is higher than the normal vibration frequency at which each resonance section resonates.

Abstract: An antenna is provided to improve the gain and to eliminate various negative effects caused by a surrounding environment in which the antenna is mounted, such as the effects caused by neighboring metal plates and the like, while providing an antenna structure to facilitate its assembly into various communication devices. The antenna emitting radio waves at a center frequency has an antenna main body and a grounding line section connected to the ground-side of the coaxial cable for supplying power to the antenna main body. The grounding line section starts from a reference point and extends in a loop so as to surround the antenna main body, and portions of the conductor line are severed so as to provide a first end terminal and a second end terminal so that the length of the conductor line from the reference point to the first end terminal corresponds to one quarter of a wavelength of the center frequency or its integral multiple.

Abstract: An antenna of a compact size enables to raise the inductance value of the resonance section and produce high gain. The antenna is constructed by connecting resonance sections and in series, in which each antenna element has an inductance section and a capacitance section connected electrically in parallel, and each inductance section has a conductor shaped in a square shape to circle the respective coil axes, and the opening sections formed at respective ends of the coil sections are contained in respective planes that are oriented at an angle to the coil axes.

Abstract: A high gain antenna of a compact external dimensions enables various devices for processing radio signals to include the antenna within the internal circuitry, so that there is no need to extend the antenna and avoid a danger of breaking the antenna, and the external appearance of the device is improved. The antenna is constructed by connecting antenna elements and in series, in which each antenna element has an inductance sections and a capacitance sections connected in parallel in such a way that magnetic fields generated by the inductance sections are oriented to intersect with one another so as to increase the signal gain.

Abstract: A compact antenna enabling to produce high gain is based on an antenna main body is constructed in such a way that a plurality of resonance sections, each having parallel-connected respective inductance sections and capacitance sections, are electrically connected in series, and a frequency adjusting capacitance section is connected electrically in series between a ground section at the ground potential and an exit end of the antenna main body. The resonance sections are constructed so that that the characteristic frequency curves overlap one another at least in the width portion to enable the antenna man body as a whole to resonate at substantially one resonance frequency, which is higher than the normal vibration frequency at which each resonance section resonates.

Abstract: An antenna is provided to improve the gain and to eliminate various negative effects caused by a surrounding environment in which the antenna is mounted, such as the effects caused by neighboring metal plates and the like, while providing an antenna structure to facilitate its assembly into various communication devices. The antenna emitting radio waves at a center frequency has an antenna main body and a grounding line section connected to the ground-side of the coaxial cable for supplying power to the antenna main body. The grounding line section starts from a reference point and extends in a loop so as to surround the antenna main body, and portions of the conductor line are severed so as to provide a first end terminal and a second end terminal so that the length of the conductor line from the reference point to the first end terminal corresponds to one quarter of a wavelength of the center frequency or its integral multiple.

Abstract: An antenna of a compact size enables to raise the inductance value of the resonance section and produce high gain. The antenna is constructed by connecting resonance sections and in series, in which each antenna element has an inductance section and a capacitance section connected electrically in parallel, and each inductance section has a conductor shaped in a square shape to circle the respective coil axes, and the opening sections formed at respective ends of the coil sections are contained in respective planes that are oriented at an angle to the coil axes.

Abstract: A high gain antenna of a compact external dimensions enables various devices for processing radio signals to include the antenna within the internal circuitry, so that there is no need to extend the antenna and avoid a danger of breaking the antenna, and the external appearance of the device is improved. The antenna is constructed by connecting antenna elements and in series, in which each antenna element has an inductance sections and a capacitance sections connected in parallel in such a way that magnetic fields generated by the inductance sections are oriented to intersect with one another so as to increase the signal gain.

Abstract: A coil element according to the present invention includes a plurality of first conductive materials formed on a base material at a predetermined pitch, an insulation material superposed on the first conductive materials, and a plurality of second conductive materials formed on the insulation material at a predetermined pitch, wherein the first conductive materials and the second conductive materials are alternately connected to each other while interposing the insulation material between the both to form a three-dimensional coil. By properly selecting a pitch, a width, or a length of the coil, it is possible to easily realize a desired high inductance vale even though a pattern area is small.