Title:
WIRELESS TRANSMISSION SYSTEM AND ELECTROMAGNETIC WAVE REFLECTION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/120137
Kind Code:
A1
Abstract:
Provided is a wireless transmission system for performing communications in a gigahertz band, wherein a blind zone is reduced and a radio wave propagation environment is improved. In the wireless transmission system, a base station positioned in a facility and a target device transmit and receive radio waves to and from each other at a frequency selected from a frequency band of 24-32 GHz, wherein, when the maximum gain of an antenna of the base station is 5-30 dBi and the facility includes a blind zone in which the reception strength is lower than in the surrounding areas by 10 dB or more, an electromagnetic wave reflection device including one or more panels having a reflection surface measuring 10 cm × 10 cm or more and 3.0 m × 3.0 m or less is disposed between the base station and the blind zone, with the center of reflection located at a height of 0.5 m or more from the floor of the facility. The sum of the distance of a straight line connecting the antenna of the base station and the electromagnetic wave reflection device and the distance of a straight line connecting the electromagnetic wave reflection device and the blind zone is 2.5-100 m.
Inventors:
KAMBARA KUMIKO (JP)
ISHIDA WATARU (JP)
KITAZUME TAKAHIRO (JP)
ISHIDA WATARU (JP)
KITAZUME TAKAHIRO (JP)
Application Number:
PCT/JP2022/044751
Publication Date:
June 29, 2023
Filing Date:
December 05, 2022
Export Citation:
Assignee:
AGC INC (JP)
International Classes:
H01Q15/14; H01Q3/44; H01Q15/23; H05K9/00
Domestic Patent References:
| WO2021199504A1 | 2021-10-07 |
Foreign References:
| JP2020184739A | 2020-11-12 | |||
| JPS6113803A | 1986-01-22 | |||
| JP2000315911A | 2000-11-14 | |||
| JP2002009481A | 2002-01-11 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
Download PDF: