When the communication distance is shortened due to metal proximity and does not operate, it is used on the NFC reader side such as smartphones, digital health devices, home appliances, and in-vehicle devices.
● The NFC/RFID system, which is a global standard, is being adopted in transportation-related contactless IC cards and electronic money, expanding convenience.
● From card form factors to system-compatible mobile phones and smart devices, small mobile electronic devices are equipped with reader/writer (R/W) functions, allowing for the active use of inexpensive NFC tags.
● As a result, everything and everywhere can connect to internet services, enabling white goods and healthcare devices without network connectivity to connect to the internet through smartphones and start collaborating with various cloud services.
● The biggest advantage is that the system can be built without imposing special burdens on stores or users.
● On the other hand, when incorporating into small mobile electronic devices, it is inevitably necessary to be close to metals such as printed circuit boards, so a method is employed that places magnetic shielding effects between the metal surface substrate and the tag antenna, as well as low-loss soft magnetic materials.
● This allows the incident magnetic flux to pass through the layer of high permeability materials and return from the end face, enabling communication even when an RF tag is attached to a metal surface.
