Title:
MAGNETIC LOOP ANTENNA AND MAGNETIC-FIELD COMMUNICATION DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2015/087724
Kind Code:
A1
Abstract:
[Purpose] The purpose of this invention is to inexpensively provide a magnetic loop antenna and a magnetic-field communication device using same that allow magnetic-field communication using magnetic-field signals with a desired bandwidth, from narrowband to wideband, at short-to-medium distances, from several centimeters to several kilometers, in an inductive channel consisting of air, a substance in which electromagnetic signals experience comparatively high propagation losses, seawater or fresh water having a salinity of 0-5%, or a combination thereof. [Solution] This magnetic loop antenna and magnetic-field communication device using same use magnetic-field signals that are inductively coupled by varying magnetic fields to implement wideband magnetic-field communication at short-to-medium distances in the abovementioned inductive channel while preventing the magnetic loop antenna from exhibiting severe mismatch loss due to radiation or reradiation of a displacement current.
More Like This:
| JP2007243291 | TAG COMMUNICATION APPARATUS, CONTROL APPARATUS, AND TAG COMMUNICATION METHOD |
| WO/2019/100162 | MASTER SAFETY LOCKOUT SYSTEM |
| WO/2019/159745 | ANTENNA DEVICE AND ELECTRONIC EQUIPMENT |
Inventors:
KAWANO MINORI (JP)
KAWANO HIRONORI (JP)
KAWANO HIRONORI (JP)
Application Number:
PCT/JP2014/081654
Publication Date:
June 18, 2015
Filing Date:
November 28, 2014
Export Citation:
Assignee:
RADIO COMM SYSTEMS LTD (JP)
KAWANO MINORI (JP)
KAWANO HIRONORI (JP)
KAWANO MINORI (JP)
KAWANO HIRONORI (JP)
International Classes:
H04B5/02; H01Q7/08; H04B1/59; H04B11/00
Domestic Patent References:
| WO2008117635A1 | 2008-10-02 | |||
| WO2011145515A1 | 2011-11-24 |
Foreign References:
| JP2012253695A | 2012-12-20 | |||
| JP2009225395A | 2009-10-01 |
Other References:
BURHAN GULBAHAR ET AL.: "A Communication Theoretical Modeling and Analysis of Underwater Magneto-Inductive Wireless Channels", IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, vol. 11, no. 9, September 2012 (2012-09-01), pages 3326 - 3334, XP011463439, DOI: doi:10.1109/TWC.2012.070912.111943
VINOD PARAMESWARAN ET AL.: "Irrigation Control using Wireless Underground Sensor Networks", 2012 SIXTH INTERNATIONAL CONFERENCE ON SENSING TECHNOLOGY (ICST, 2012, pages 653 - 659, XP032330289, DOI: doi:10.1109/ICSensT.2012.6461760
VINOD PARAMESWARAN ET AL.: "Irrigation Control using Wireless Underground Sensor Networks", 2012 SIXTH INTERNATIONAL CONFERENCE ON SENSING TECHNOLOGY (ICST, 2012, pages 653 - 659, XP032330289, DOI: doi:10.1109/ICSensT.2012.6461760
Download PDF:
Previous Patent: RADIATION IMAGE SENSOR
Next Patent: MAGNETIC SENSOR DEVICE AND MAGNETIC ENCODER DEVICE
Next Patent: MAGNETIC SENSOR DEVICE AND MAGNETIC ENCODER DEVICE