Title:
VEHICLE-MOUNTED ANTENNA DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/210106
Kind Code:
A1
Abstract:
Provided is a vehicle-mounted antenna device that has a noise blocking effect and that can also be reduced in thickness. The vehicle-mounted antenna device installed on a vehicle comprises a first element 10 and a second element 20. The first element 10 is a capacitive antenna corresponding to a first frequency band. The second element 20 is a resonant antenna that is disposed at a position at which the second element 20 blocks noise from a noise generation source to the first element 10, that blocks noise, and that corresponds to a second frequency band higher than the first frequency band. An attenuation circuit 21 for attenuating a signal in the first frequency band may be connected to the second element.
Inventors:
IMAMURA YUTAKA (JP)
Application Number:
PCT/JP2020/016630
Publication Date:
October 21, 2021
Filing Date:
April 15, 2020
Export Citation:
Assignee:
HARADA IND CO LTD (JP)
International Classes:
H01Q1/44; H01Q1/32; H01Q1/52; H01Q21/30
Domestic Patent References:
| WO2001059875A2 | 2001-08-16 |
Foreign References:
| JP2018121143A | 2018-08-02 | |||
| JPH08139522A | 1996-05-31 | |||
| US20040056803A1 | 2004-03-25 | |||
| JP2003124830A | 2003-04-25 | |||
| JP2007281581A | 2007-10-25 | |||
| JP2018182556A | 2018-11-15 | |||
| JP2008003003A | 2008-01-10 |
Attorney, Agent or Firm:
NAMAI, Kazuhira (JP)
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