Patent ID: 7515436

Claim:
A communication unit comprising: a ground layer section which is a sheet-like conductive material; a power-source layer section which is a sheet-like conductive material laid out opposite to said ground layer section, and whose electric potential to said ground layer section becomes a predetermined reference electric potential; a plurality of conductive layer sections which are sheet-like conductive materials laid out between said ground layer section and said power-source layer section; a plurality of coupling resistor sections which are laid out between said ground layer section and said power-source layer section, and couple adjacent ones of said plurality of conductive layer sections with each other; a plurality of pull resistor sections which couple said power-source layer section and said plurality of conductive layer sections, respectively; and a plurality of communication elements which are respectively associated with said plurality of conductive layer sections, transmit information by changing electric potentials of said associated conductive layer sections to said ground layer section, and acquire said transmitted information by detecting changes in electric potentials to be propagated to those conductive layer sections which are adjacent to said associated conductive layer sections through any of said plurality of coupling resistor sections.