Title:
VEHICLE ANTENNA DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/188072
Kind Code:
A1
Abstract:
A vehicle antenna device is provided that is appropriate for reducing thickness with a low-cost structure, while preventing the deterioration of antenna characteristics. The vehicle antenna device comprises an antenna element 10, a circuit board 20, a coil 30, an amp circuit 40, and a fixing part 50. The antenna element 10 functions as a capacitive antenna that supports a first frequency band. The circuit board 20 has a power supply part 21 to which a power supply line 12 of the antenna element 10 is connected. The coil 30 is electrically connected to the power supply part 21 so that the antenna element 10 has an antenna length corresponding to a second frequency band. The fixing part 50 is formed from the same member as the end part of the antenna element 10, in order to fix the circuit board 20 to the antenna element 10 in a position near the position at which the coil 30 is mounted and far from the position at which the amp circuit 40 is installed. The fixing part 50 is provided with a gap such that there is no effect from the coupling with the coil 30.
Inventors:
ISHIDA JUN (JP)
YOSHIGA TOMOCHIKA (JP)
YOSHIGA TOMOCHIKA (JP)
Application Number:
PCT/JP2019/008871
Publication Date:
October 03, 2019
Filing Date:
March 06, 2019
Export Citation:
Assignee:
HARADA IND CO LTD (JP)
International Classes:
H01Q1/32; H01Q5/335; H01Q9/30
Foreign References:
| JP2017220915A | 2017-12-14 | |||
| JP3129472U | 2007-02-22 |
Attorney, Agent or Firm:
NAMAI, Kazuhira (JP)
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