Title:
WIRELESS COMMUNICATION UNIT AND WIRELESS CHANGING METHOD
Document Type and Number:
WIPO Patent Application WO/2022/091847
Kind Code:
A1
Abstract:
Provided is a wireless communication unit capable of efficiently performing radio wave transmission/reception through an antenna even when a wireless communication device is provided under the ground. A wireless communication unit 1 comprises: a container body 10 which is buried under the ground and which stores a cable 2 and a wireless communication device 3 having an antenna 32; a lid member 11 that closes upper end openings 10a, 10b of the container body 10; a reflected power monitor 12 that measures the magnitude of reflected power resulting from reflection, on the antenna 32 of the wireless communication device 3, of a portion of transmission power supplied to the antenna 32; a matching circuit 13 that performs impedance matching; and a control unit 14 that determines the presence or absence of an object in accordance with a ratio of the reflected power measured by the reflected power monitor 12 to the transmission power, and controls the matching circuit 3 on the basis of the ratio of the reflected power to the transmission power.
Inventors:
HAMADA HIROKI (JP)
Application Number:
PCT/JP2021/038467
Publication Date:
May 05, 2022
Filing Date:
October 18, 2021
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD (JP)
International Classes:
H04B1/04; H04B1/03; H04B17/18
Foreign References:
| JP2013502137A | 2013-01-17 | |||
| JP2005012516A | 2005-01-13 |
Other References:
ANONYMOUS: "Cases of underground base stations and evaluation results of radio wave exposure, Information and Communication Technology Subcommittee, Radio Wave Utilization Committee, Base Station Evaluation Method Working Group (2nd) Handouts, Ministry of Internal Affairs and Communications", 27 February 2020 (2020-02-27), XP055926709, Retrieved from the Internet [retrieved on 20220531]
ATSUSHI HIGASHI, HIDEAKI SHIRANAGA, SATOSHI KIDO: "A-14-4 A Method of Pedestrian Detection using Millimeter-wave Radar for Driving Safety Support Systems", PROCEEDINGS OF THE IEICE ENGINEERING SCIENCES SOCIETY/NOLTA SOCIETY CONFERENCE, MARCH 19-22, 2019, 5 March 2019 (2019-03-05) - 22 March 2019 (2019-03-22), JP , pages 124, XP009536551, ISSN: 2189-700X
ATSUSHI HIGASHI, HIDEAKI SHIRANAGA, SATOSHI KIDO: "A-14-4 A Method of Pedestrian Detection using Millimeter-wave Radar for Driving Safety Support Systems", PROCEEDINGS OF THE IEICE ENGINEERING SCIENCES SOCIETY/NOLTA SOCIETY CONFERENCE, MARCH 19-22, 2019, 5 March 2019 (2019-03-05) - 22 March 2019 (2019-03-22), JP , pages 124, XP009536551, ISSN: 2189-700X
Attorney, Agent or Firm:
SAITO Takuya et al. (JP)
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