Electric current and electric field induced in the human body when exposed to an incident electric field near the resonant frequency

2000 ◽  
Vol 48 (9) ◽  
pp. 1537-1543 ◽  
Author(s):  
R.W.P. King
Keyword(s):  
Electric Field ◽  
Resonant Frequency ◽  
Electric Current ◽  
Human Body ◽  
Incident Electric Field

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.

Soft X-ray emission from an anharmonic collisional nanoplasma by a laser–nanocluster interaction

2021 ◽  
Vol 87 (3) ◽  
Author(s):  
R. Nemati Siahmazgi ◽  
S. Jafari
Keyword(s):  
Electric Field ◽  
Laser Beam ◽  
Resonant Frequency ◽  
Restoring Force ◽  
Cluster Radius ◽  
X Ray ◽  
Nonlinear Restoring Force ◽  
Cluster Temperature ◽  
Argon Clusters ◽  
Helium Neon

The purpose of the present paper is to investigate the generation of soft X-ray emission from an anharmonic collisional nanoplasma by a laser–nanocluster interaction. The electric field of the laser beam interacts with the nanocluster and leads to ionization of the cluster atoms, which then produces a nanoplasma. Because of the nonlinear restoring force in an anharmonic nanoplasma, the fluctuations and heating rate of, as well as the power radiated by, the electrons in the nanocluster plasma will be notably different from those arising from a linear restoring force. By comparing the nonlinear restoring force state (which arises from an anharmonic cluster) with that of the linear restoring force (in harmonic clusters), the cluster temperature specifically changes at the resonant frequency relative to the linear restoring force, while the variation of the anharmonic cluster radius is almost identical to that of the harmonic cluster radius. In addition, it is revealed that a sharp peak of X-ray emission arises after some picoseconds in deuterium, helium, neon and argon clusters.

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