Title:
ANTENNA DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/038079
Kind Code:
A1
Abstract:
An antenna device (10) is provided with a substrate (300), a ground electrode (30), a power feed element (20), and a parasitic element (40). The length of the substrate (300) in a first direction is not greater than approximately 1/4 of the wavelength of a high-frequency signal to be transmitted or received. The ground electrode (30) is formed on a surface of the substrate (300). The power feed element (20) is formed on a section of the surface of the substrate (300) in which the ground electrode (30) is not formed, and is connected to a power feeding point. The parasitic element (40) is disposed away from the surface of the substrate (300) and is capacitively coupled to the power feed element (20). The parasitic element (40) is provided with a first electrode section (41), a second electrode section (42), and a third electrode section (43). The first electrode section (41) has a shape extending in the first direction. The second electrode section (42) is connected to a first end, in the first direction, of the first electrode section (41), and has a shape extending in a second direction. The third electrode section (43) is connected to a second end, in the first direction, of the first electrode section (41), and has a shape extending in the second direction.
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Inventors:
TANBO YASUO (JP)
Application Number:
PCT/JP2017/029866
Publication Date:
March 01, 2018
Filing Date:
August 22, 2017
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01Q9/42; H01Q1/24; H01Q3/44
Domestic Patent References:
| WO2009019782A1 | 2009-02-12 | |||
| WO2005013414A2 | 2005-02-10 | |||
| WO2002050948A1 | 2002-06-27 |
Foreign References:
| JP2006041689A | 2006-02-09 | |||
| JP2003198410A | 2003-07-11 | |||
| JP2011109547A | 2011-06-02 | |||
| JP2003110329A | 2003-04-11 | |||
| US20130181871A1 | 2013-07-18 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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