Absorbing materials overcome NFC / RFID antenna interference problem, soft magnetic materials, absorbing materials
In recent years, various new applications based on NFC/RFID technology have ushered in an unprecedented period of rapid growth, especially in the current hot mobile payment market. In 2014, the transaction value reached nearly $325 billion, compared with 2013. Compared with the transaction value of US$235.4 billion, the growth rate is 38%. In the foreseeable future, the global mobile payment market will continue to maintain a compound growth rate of around 40%.
The potential of the market is undoubtedly huge, but it is also because of the technology-driven technological industry that is driven by NFC/RFID. It must be said that there are still many technical obstacles that are difficult to overcome in NFC/RFID today, which is also hindering further market expansion. The important reason.
Absorbing material structure diagram
Currently, one material used to solve the interference problem is a magnetic material. Generally, magnetic materials are classified into permanent magnetic materials (Hc>1000A/m) and soft magnetic materials (Hc<100A/m), while NFC/RFID is designed with soft magnetic materials, that is, absorbing materials.
ferrite soft magnet structure diagram
What is the specific role of so-called absorbing materials? When the NFC/RFID is working, the magnetic field formed by the antenna is easily interfered by metal and other items, which causes unnecessary errors in the identification of the device, and the use of the HFC absorbing material can eliminate this error well (as shown in the figure below). . For example, an NFC/RFID antenna is typically placed between the back cover of the phone and the battery, and the battery is prone to interference with the magnetic field. In this case, we only need to put a layer of absorbing material between the antenna and the battery to eliminate this. The adverse effects of interference.
HIF-magnetic material for the working principle of RFID
Moreover, HFC ferrites and absorbing materials also have a large number of applications in wireless charging and EMI.
Anti-electromagnetic interference principle of absorbing materials
These materials can solve the interference problems of various applications such as RFID/NFC/Wireless charging! Promote the continuous and rapid development of the Internet of Things!
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