scholarly journals Electromagnetic Field Analysis of Human Body Communication between Wearable Device Mounted on Human Arm and Stationary Equipment Considering Effect of the Earth Ground

2017 ◽  
Vol 25 (1) ◽  
pp. 49-54
Author(s):  
Fukuro KOSHIJII ◽  
Yusuke FUJITA ◽  
Kohji KOSHIJI ◽  
Dairoku MURAMATSU ◽  
Ken SASAKI
Keyword(s):  
Electromagnetic Field ◽  
Human Body ◽  
Wearable Device ◽  
Field Analysis ◽  
The Earth ◽  
Human Arm ◽  
Human Body Communication

scholarly journals Electromagnetic Field Analysis of Signal Transmission Path and Electrode Contact Conditions in Human Body Communication

2018 ◽  
Vol 8 (9) ◽  
pp. 1539 ◽  
Author(s):  
Kentaro Yamamoto ◽  
Yoshifumi Nishida ◽  
Ken Sasaki ◽  
Dairoku Muramatsu ◽  
Fukuro Koshiji
Keyword(s):  
Electric Field ◽  
Electric Current ◽  
Human Body ◽  
Signal Transmission ◽  
Strength Distribution ◽  
Capacitive Coupling ◽  
Field Analysis ◽  
Return Path ◽  
Field Lines ◽  
Human Body Communication

Human body communication (HBC) is a wireless communication method that uses the human body as part of the transmission medium. Electrodes are used instead of antennas, and the signal is transmitted by the electric current through the human body and by the capacitive coupling outside the human body. In this study, direction of electric field lines and direction of electric current through the human body were analyzed by the finite-difference time-domain method to clarify the signal path, which is not readily apparent from electric field strength distribution. Signal transmission from a transmitter on the subject’s wrist to an off-body receiver touched by the subject was analyzed for two types of transmitter electrode settings. When both the signal and ground electrodes were put in contact with the human body, the major return path consisted of capacitive coupling between the receiver ground and the human body, and the electric current through the human body that flowed back to the ground electrode of the transmitter. When the ground electrode was floating, the only return path was through the capacitive coupling of the floating ground. These results contribute to the better understanding of signal transmission mechanism of HBC and will be useful for developing HBC applications.

scholarly journals APPLYING ELECTROMAGNETIC FIELD ANALYSIS TO MINIMIZE THE EARTH RESISTANCE ON HIGH RESISTIVITY SOILS

2020 ◽  
Vol 96 ◽  
pp. 157-167
Author(s):  
Silvia Ronda Peñacoba ◽  
Clara Oliver García ◽  
OIbar Martínez Vilchez ◽  
Patricia Márquez Paniagua ◽  
Jose Miguel Miranda Pantoja
Keyword(s):  
Electromagnetic Field ◽  
Field Analysis ◽  
High Resistivity ◽  
The Earth
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