Electric RFID communication via human body

Communications of RFID are not limited only to magnetic inductive coupling between two coils. If the same transmission efficiency is obtained, RFID communications by electric inductive coupling between two electrodes can be accomplished. RFID with electric field coupling with electrodes instead of coils is developed by using as-is communication modules and ICs. Electric field signal can travel along dielectrics and/or conductors, and human bodies show characteristics of dielectric and conductor in high frequency. It means human body can carry RFID signal, and RFID transaction can be done through the body by hand touch. Electric RFID communication has a big potential to realize intuitive and natural interface of “machine to human” or “human to machine to human” communications.