| 摘要 |
PURPOSE: To facilitate the production of a read-write antenna and to secure the sure communication when an identification system is applied for identification of the cattle, etc. CONSTITUTION: The multicore cables 41 and 42 are circularly arranged, and the coated optical fibers of the both cables are set opposite to each other between both end parts and connected together at the end parts adjacent to each other. Thus a coil is formed. This coil is attached to a base member so that a read-write antenna 12 is obtained. Then such a coil is also applied to a data carrier. That is, the coils are put on the cattle like collars. In such a way, the coil can be easily produced and the communication efficiency is improved. |
