The antenna coils that are now used for non-contact communication are integrated on the surface of the IC chip, which is composed of an antenna coil, a power generation circuit, a control circuit, and a memory integrated with the chip. Before I do not understand it, always thought that only the antenna used in the television, and now even on the chip has its shadow, in fact, many places have its shadow, which we have some concern about it. Then the antenna coil is used as a representative of the field of the coil. What kind of effect will it bring, let the time to witness the antenna coil bar.