This invention aims to provide a communication device, installation structure
for the communication device, a method of manufacturing the communication device,
and a method of communication with the communication device in which the communication
device is able to exceedingly restain a conductive material from attenuating magnetic
flux and to expand communication distance even when the communication device is
attached to a conductive member e.g., metal, in a closely contacting manner.
This invention has a sheet-like amorphous magnetic material being arranged in
a manner extending from a magnetic flux generating portion of a concentric disk-shaped
antenna coil of an RFID tag serving as the communication device to an outer area
of the antenna coil.
