Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
ANTENNA DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/092794
Kind Code:
A1
Abstract:
An antenna device is provided with: a base plate (10), an opposing conductor plate (30), a short-circuiting portion (40) and a power-feed point (51). The surface area of the opposing conductor plate is set in such a way as to form an electrostatic capacitance which, together with an inductance provided by the short-circuiting portion, causes parallel resonance to occur at a prescribed first frequency. At least one second frequency electric field interference element (31, 31A, 31B, 11A, 11B, 61, 62, 71, 72) which, at a second frequency higher than the first frequency, impedes propagation of an electric field perpendicular to the base plate, from the short-circuiting portion toward an outer edge portion of the opposing conductor plate, but does not impede propagation of an electric field at the first frequency, is provided in the opposing conductor plate or the base plate, or between the opposing conductor plate and the base plate. The second frequency electric field interference element is disposed in such a way that the electrical surface area of the opposing conductor plate with regard to a second frequency signal forms an electrostatic capacitance, which, together with the inductance provided by the short-circuiting portion, causes parallel resonance to occur at the second frequency.

More Like This:
Inventors:
IKEDA, Masakazu (C/O NIPPON SOKEN, INC. 14, Iwaya, Shimohasumi-cho, Nishio-cit, Aichi 12, 〒4450012, JP)
KURAOKA, Hiroaki (C/O DENSO CORPORATION, 1-1 Showa-cho, Kariya-cit, Aichi 61, 〒4488661, JP)
Application Number:
JP2015/006039
Publication Date:
June 16, 2016
Filing Date:
December 04, 2015
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
DENSO CORPORATION (1-1 Showa-cho, Kariya-city Aichi, 61, 〒4488661, JP)
International Classes:
H01Q13/08; H01Q5/10
Domestic Patent References:
WO2006011459A12006-02-02
Foreign References:
JP2005033343A2005-02-03
JPH05226923A1993-09-03
JP2003087049A2003-03-20
JP2004531152A2004-10-07
Attorney, Agent or Firm:
KIN, Junhi (6th Floor, Takisada Bldg. 2-13-19, Nishiki, Naka-ku, Nagoya-cit, Aichi 03, 〒4600003, JP)
Download PDF: