Title:
TRANSMISSION DEVICE, TRANSMISSION METHOD, AND TRANSMISSION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/094399
Kind Code:
A1
Abstract:
A transmission device 100 comprises the following: a communication unit 110 provided with input/output terminals for inputting and outputting electrical signals of a prescribed frequency; and two coupling electrodes 120a, 120b that couple with the input/output terminals respectively and that couple with one transmission medium 200 so as to be side-by-side in the longitudinal direction of the transmission medium 200. An input/output circuit of the communication unit 110 is constituted by a balanced circuit that can cause the two coupling electrodes 120a, 120b to function so as to be mutually switchable. The two coupling electrodes 120a, 120b are, when coupled with the transmission medium 200, disposed along the longitudinal direction of the transmission medium 200 at positions that are symmetrical on a surface orthogonal to the direction in which electrical signals flow. In a case where the two coupling electrodes 120a, 120b are coupled with transmission medium 200, and in a case where the length from one coupling electrode of the two coupling electrodes 120a, 120b to one end of the transmission medium 200 in the longitudinal direction thereof is the electrical length in the (2n·90±45) degree (n is an integer of at least 0) range of electrical signals and the length from the second coupling electrode of the two coupling electrodes 120a, 120b to the second end of the transmission medium 200 in the longitudinal direction thereof is the electrical length in the ((2n+1)·90±45) degree range of electrical signals, the communication unit 110 sends and receives electrical signals to and from another transmission device 300 that is coupled with the transmission medium 200 in a region thereof which is the electrical-length in the (2n·90±45) degree range electrical signals, such sending and receiving carried out as a result of a region of the transmission medium 200 from the position at which the second coupling electrode is coupled to the second end of the medium serving as ground, in a case where the two coupling electrodes 120a, 120b have been coupled with transmission medium 200.
More Like This:
| JP4908187 | Communication sheet structure |
| JP2015111765 | ELECTRIC FIELD COMMUNICATION BYPASS SYSTEM |
| WO/2011/111120 | COMMUNICATION DEVICE |
Inventors:
WASHIRO TAKANORI (JP)
Application Number:
PCT/JP2016/081613
Publication Date:
June 08, 2017
Filing Date:
October 25, 2016
Export Citation:
Assignee:
ENFC INC (JP)
International Classes:
H04B13/00
Domestic Patent References:
| WO2015170367A1 | 2015-11-12 |
Foreign References:
| JP2002246987A | 2002-08-30 | |||
| JP2011508499A | 2011-03-10 |
Other References:
KATSUYUKI FUJII ET AL.: "Electric field distributions of wearable devices using the human body as a transmission channel", IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, vol. 55, no. 7, July 2007 (2007-07-01), pages 2080 - 2087, XP011187036
SUNG, J.B. ET AL.: "Effects of ground electrode on signal transmission of human body communication using human body as transmission medium", ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, 2006, pages 491 - 494, XP010947423
BAE, JOONSUNG ET AL.: "A 0.24-nJb wireless body-area-network transceiver with scalable double-FSK modulation", IEEE JOURNAL OF SOLID- STATE CIRCUITS, vol. 47, no. 1, January 2012 (2012-01-01), pages 310 - 322, XP011390435
See also references of EP 3386122A4
SUNG, J.B. ET AL.: "Effects of ground electrode on signal transmission of human body communication using human body as transmission medium", ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, 2006, pages 491 - 494, XP010947423
BAE, JOONSUNG ET AL.: "A 0.24-nJb wireless body-area-network transceiver with scalable double-FSK modulation", IEEE JOURNAL OF SOLID- STATE CIRCUITS, vol. 47, no. 1, January 2012 (2012-01-01), pages 310 - 322, XP011390435
See also references of EP 3386122A4
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
Download PDF: