Signal Propagation Characteristics between Transceivers on Human Body for MHz-Band Near-Field Coupling Communication

A method is presented for precisely evaluating signal propagation loss on the human body between transceivers in near--field coupling communication (NFCC) that uses the surface of the human body as a transmission path. It is important to assess the loss of signal propagation on the human body to design stable and reliable NFCC networks. We measured signal intensity to compare two methods of measurement with a battery-powered transmitter and an AC-powered signal generator. The results revealed that the AC-powered signal generator affected the communication path. Furthermore, we successfully found a distance dependence of signal loss between transceivers on the human body. We clarified the necessity for properly setting the transmitter power and receiver sensitivity that corresponded to the distance dependence of signal loss.

[1]  Hoi-Jun Yoo,et al.  The Human Body Characteristics as a Signal Transmission Medium for Intrabody Communication , 2007, IEEE Transactions on Microwave Theory and Techniques.

[2]  Alberto Fazzi,et al.  A 2.75mW wideband correlation-based transceiver for body-coupled communication , 2009, 2009 IEEE International Solid-State Circuits Conference - Digest of Technical Papers.

[3]  Nozomi Haga,et al.  Proper Derivation of Equivalent-Circuit Expressions of Intra-Body Communication Channels Using Quasi-Static Field , 2012, IEICE Trans. Commun..

[4]  R. W. Lau,et al.  The dielectric properties of biological tissues: II. Measurements in the frequency range 10 Hz to 20 GHz. , 1996, Physics in medicine and biology.

[5]  Hitoshi Shimasaki,et al.  Signal measurement system using electrically isolated probe for MHz-band near-field coupling communication , 2013, 2013 IEEE International Instrumentation and Measurement Technology Conference (I2MTC).

[6]  Hoi-Jun Yoo,et al.  The Signal Transmission Mechanism on the Surface of Human Body for Body Channel Communication , 2012, IEEE Transactions on Microwave Theory and Techniques.

[7]  Thomas G. Zimmerman,et al.  : Near-field , 2022 .

[8]  Hitoshi Shimasaki,et al.  Human-area networking technology based on near-field coupling transceiver , 2012, 2012 IEEE Radio and Wireless Symposium.