In the development of intrabody communication systems, it is important to understand the effects of user's posture on the communication channels. In this study, dynamic measurements of intrabody communication channels were made and their dependences on the grounding conditions were investigated. Furthermore, the physical mechanism of the dynamic communication channels was discussed based on electrostatic simulations. According to the measured and the simulated results, the variations in the signal transmission characteristics depend not only on the distance between the Tx and the Rx but also on the shadowing by body parts.

Electromagnetic scattering by four perfectly conducting rectangular cylinders is analyzed by Point Matching Method. The numerical results are in full agreement with the results for the well known integral solution method. And this letter give not only the field calculated around four cylinders but also model experiments using a line source at 9.6 GHz. The numerical results are in nearly good agreement with the experimental results.

The problem is deduced to scattering from four conducting rectangular cylinders by using the electric image method and analyzed by Point Matching Method. This letter gives not only near field distribution but also model experiments using a line source at 9.6 GHz. Numerical result is in nearly good agreement with the experimental result.