Title:
RESONANCE CIRCUIT INCLUDING ANTENNA
Document Type and Number:
Japanese Patent JP2012209749
Kind Code:
A
Abstract:
To provide a resonance circuit that enables an adjustment to resonance frequency dispensing with any mechanical changes to a wiring pattern.
According to an embodiment of the resonance circuit in which an antenna circuit including a coiled antenna element for receiving a carrier wave and a variable reactance circuit electrically connected to the antenna circuit produce parallel resonance, the variable reactance circuit includes a first variable capacitance capacitor whose capacitance value varies with applied bias voltage. The first variable capacitance capacitor comprises, for example, a laminated ceramic capacitor.
More Like This:
| JP3916699 | DATA EXCHANGE SYSTEM WITH PLURAL DATA CARRIERS |
| WO/1998/032238 | TRANSPONDER COMMUNICATION DEVICE |
| JP2012077465 | RADIO COMMUNICATION SYSTEM |
Inventors:
IKENAGA MICHIKAZU
TAKAHASHI SEISHIN
NATSUME SHINJI
KAZAMA SATOSHI
TAKAHASHI SEISHIN
NATSUME SHINJI
KAZAMA SATOSHI
Application Number:
JP2011073607A
Publication Date:
October 25, 2012
Filing Date:
March 29, 2011
Export Citation:
Assignee:
TAIYO YUDEN KK
International Classes:
H04B1/59; H03H5/12; H04B5/02
Domestic Patent References:
| JP2003347952A | 2003-12-05 | |||
| JP2005311762A | 2005-11-04 | |||
| JP2005063123A | 2005-03-10 | |||
| JPH08154029A | 1996-06-11 | |||
| JP2010055570A | 2010-03-11 | |||
| JP2002009573A | 2002-01-11 | |||
| JP2011019186A | 2011-01-27 | |||
| JP2006135892A | 2006-05-25 |
Attorney, Agent or Firm:
Satoshi Murakoshi
Previous Patent: AUDIO SIGNAL AMPLIFICATION DEVICE
Next Patent: LAMINATED RESONATOR AND METHOD OF MANUFACTURING LAMINATED RESONATOR
Next Patent: LAMINATED RESONATOR AND METHOD OF MANUFACTURING LAMINATED RESONATOR