1
Kamisaka Koichi: Communication type recording medium. Hitachi Maxell, December 22, 2005: JP2005-352858 (128 worldwide citation)

PROBLEM TO BE SOLVED: To provide a communication type recording medium such as a noncontact IC card or an RFID system that increases a communication range.SOLUTION: A first wiring 110 formed on one side of a base forms: (1) a first coil pattern 111 formed at the end of the first wiring while facing ...


2
Hasebe Takehiko, Goto Yasushi, Kamisaka Koichi, Yazawa Yoshiaki, Torigoe Makoto: Semiconductor chip with coil-like antenna and communication system using the same. Hitachi, August 25, 2005: JP2005-228785 (13 worldwide citation)

PROBLEM TO BE SOLVED: To solve the problem that the communication distance is reduced with the decrease of an induced voltage when a coil-like antenna is miniaturized to a chip size.SOLUTION: The semiconductor chip has a coil-like antenna and a circuit surface for transmitting/receiving radio signal ...


3
Kamisaka Koichi, Shinpo Kenichi: Magnetic field probe. Hitachi, May 31, 2002: JP2002-156430 (9 worldwide citation)

PROBLEM TO BE SOLVED: To provide a magnetic field probe of the type of a coil of a plurality of windings of which the sensitivity in the direction of the orthogonal axis is not heightened even if the coil of a plurality of windings is used and which can be easily and minutely formed with high accura ...


4
Kamisaka Koichi, Suga Taku, Makuuchi Masami: Reader or/and writer, and ic card system using them. Hitachi, May 30, 2000: JP2000-148932 (8 worldwide citation)

PROBLEM TO BE SOLVED: To transmit power enough to operate an IC card within the desired communication distance from a reader or/and a writer, and to suppress electric field strength becoming farther than the desired communication distance. SOLUTION: In this reader or/and writer which feeds at least ...


5
Kamisaka Koichi, Suga Taku: Survey system for generation source of electromagnetic wave. Hitachi, October 2, 2003: JP2003-279611 (7 worldwide citation)

PROBLEM TO BE SOLVED: To enhance the survey precision for an electromagnetic wave generation source.SOLUTION: This system is provided with a magnetic field probe for measuring a magnetic field distribution in the vicinity of a three-dimensional casing, a means for moving the probe x-directionally, y ...


6
Noma Tatsuji, Suga Taku, Kamisaka Koichi: Circuit with capacitor and wiring board. Hitachi, January 26, 2001: JP2001-023849 (5 worldwide citation)

PROBLEM TO BE SOLVED: To provide a capacitor capable of reducing equivalent series inductance.SOLUTION: A power source pattern 10 mounted with capacitors and a ground pattern 11, mounted with capacitors are formed on a face, on which parts are mounted. Each of 1608 type chip capacitors 8a, 8b, 8c, 8 ...


7
Kamisaka Koichi, Shinpo Kenichi, Torigoe Makoto: Probe for measuring near electromagnetic field. Hitachi, September 21, 2001: JP2001-255347 (5 worldwide citation)

PROBLEM TO BE SOLVED: To measure only electromagnetic ware component from a measurement target by allowing an antenna for measuring electromagnetic waves having a single directivity.SOLUTION: By attaching a metal horn and/or a dielectric to an antenna, directivity is set to single directivity.


8
Torigoe Makoto, Kanai Hisaaki, Suga Taku, Kamisaka Koichi: High frequency transmission line, and electronic component or electronic device using the same. Opnext Japan, April 25, 2003: JP2003-124712 (4 worldwide citation)

PROBLEM TO BE SOLVED: To provide a high frequency transmission line in which a change in characteristic impedance is reduced and transmission characteristics are improved in a transmission line for transmitting high speed signals.SOLUTION: The characteristics impedance is kept substantially constant ...


9
Shinpo Kenichi, Kamisaka Koichi, Suga Taku: Magnetic-field measuring device. Hitachi, August 24, 2001: JP2001-228227 (3 worldwide citation)

PROBLEM TO BE SOLVED: To provide a magnetic-field measuring device with an N-turn-coil magnetic-field probe in which error voltage is reduced and accuracy in magnetic- field detection is improved.SOLUTION: By connecting a reversely wound N-turn coil 13 formed in the opposite direction of winding to ...


10
Ozeki Yoshio, Matsumoto Kunio, Kamisaka Koichi: Radio ic card and its production. Hitachi, June 16, 2000: JP2000-163543 (3 worldwide citation)

PROBLEM TO BE SOLVED: To provide an inexpensive thin radio IC card, which has the heat radiation property improved, and to provide its production method.SOLUTION: A metallic film 17 for antenna coil and a metallic foil 17 for heat sink are simultaneously formed on a lower cover sheet 16 consisting o ...