Title:
WIRELESS COMMUNICATION DEVICE, WIRELESS NETWORK SYSTEM AND METHOD FOR PLACING WIRELESS COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/088192
Kind Code:
A1
Abstract:
The present invention provides easy installation and a method for communication to an area shielded from electromagnetic waves. The present invention is characterized by placing an antenna element in close contact with a wall surface near a metal door, further characterized in that the antenna element is a dipole antenna or planar antenna element, and further characterized in that the antenna element has a dielectric layer for covering with a dielectric with a dielectric constant ε2 greater than or equal to the dielectric constant ε1 of the wall surface, the dielectric layer is placed in close contact with the wall surface, and the antenna element is designed in consideration of a wavelength shortening effect generated by the dielectric constant ε2.
Inventors:
SATO YOSHIHITO (JP)
YAMADA TSUTOMU (JP)
SATOMI HIROHISA (JP)
OBA NOZOMI (JP)
YAMADA TSUTOMU (JP)
SATOMI HIROHISA (JP)
OBA NOZOMI (JP)
Application Number:
PCT/JP2017/038267
Publication Date:
May 17, 2018
Filing Date:
October 24, 2017
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H04B7/145; H01Q1/22; H04B17/391; H04W16/20
Foreign References:
| JP2004229022A | 2004-08-12 | |||
| JPH09217463A | 1997-08-19 | |||
| JP2002171211A | 2002-06-14 |
Attorney, Agent or Firm:
TODA Yuji (JP)
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