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Influences of user's posture and contact conditions of electrodes on the transmission characteristics of human body communication (HBC) were studied. A subject wore a transmitter on the left wrist and touched the receiver electrode with his right or left index finger. User's postures were selected from possible scenarios in practical applications. Electrodes of the transmitter and/or the receiver...
Human body communication (HBC) is a wireless transmission method that utilizes the human body as part of the transmission medium. In HBC, a high-frequency signal is transmitted by a current flowing through the body surface and via the near-field electric field around it. Due to the lack of specific equipment and tools to measure HBC transmission characteristics, HBC systems are still in the development...
Human body communication (HBC) is a wireless communication method that uses human body as part of the transmission medium. It uses electrodes instead of antennas to generate electric field around the human body. This electric field forms capacitive couplings between transmitter, receiver, human body, and surrounding environment. Transmission from a transmitter on user's wrist to an off-body receiver...
In Human Body Communication (HBC), electrodes are equivalent to antennas in other wireless communication. Transmission from a transmitter worn on the wrist to an off-body receiver touched by the subject's finger at frequency of 10 MHz was investigated. The received signal voltage was measured for transmission electrodes of several different dimensions and electrode distances. The results were compared...
Ground loop through the floor is often modeled in the transmission model of Human Body Communication (HBC). This paper reports evaluation of ground loop through the floor in HBC between two subjects shaking their hands, and HBC between a subject and a stationary receiver on the floor. Subjects wore a transmitter or a receiver on the wrist. Received signal strength was measured on carpet-covered aluminum...
Human body communication (HBC) is expected to become a unique man-machine interface because the transmission path is established only when the user touches the target device. In this study, HBC between a stationary device and a wearable device worn on the wrist was investigated. Transmission characteristics between the devices and electric field around the human body model were calculated by electromagnetic...
Intra-body communication draws attention as a promising wireless technology in order to materialize wireless body-centric networks. An electrode in intra-body communication system is a key device since the electrodes are analogous to antennas in airborne wireless communication system. However, nobody has addressed the broadband input impedance characteristics of the electrodes although there are a...
Human body communication is expected as a new human interface for communications among several persons. Thus, it is necessary to analyze the transmission characteristics between human bodies. In this paper, we compared the transmission characteristics between transmitter and receiver in the viewpoint of contact situation between two bodies. Moreover, the effect of receiver position on transmission...
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