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Breakthrough in anti-interference technology of RFID/NFC tag absorbing materials

Author:admin   AddTime:2021-09-23

With the increasing use of RFID, the problem of interference and destruction has become more and more prominent. Its destructive effect is mainly manifested in two aspects: 1> the recognition distance is much lower than the design distance; 2> the reader and the electronic tag do not respond, and the reading fails. In the actual application of high-frequency RFID electronic tags, we need to focus on the placement of 13.56MHz RFID electronic tags. Due to the large size of the tags and the limited space allowed, the electronic tags need to be directly attached to the metal surface. For example, the 13.56MHz RFID smart tag used in mobile phones is often directly integrated on the aluminum alloy stamping shell of the battery due to space problems. In this way, the electronic tag is vulnerable to the battery during the identification process. The eddy current interference of the aluminum alloy metal stamping shell causes the actual effective reading distance of the RFID tag to be greatly shortened or there is no response at all, and the reading fails completely. Practice has proved that this type of interference problem occurs frequently, and we need to take certain measures to prevent it.



Aiming at the anti-metal interference problem of the popular RFID/NFC tag (13.56Mhz), a full series of anti-metal interference materials have been developed. For customers' high, middle and low requirements, one-stop solution to the anti-interference problem of RFID/NFC tags for customers. It will focus on its absorbing material products and technological strength. The first domestic high-tech company with the core business of R&D, production, sales and technical support of sheet absorbing materials. Independently developed a series of flexible electromagnetic functional materials such as wave absorbing materials and magnetic isolation sheets with the domestic leading level. Products are widely used in mobile phones, laptops, digital cameras, GPS, wireless chargers, RFID, NFC and other fields, effectively solving the problems of wave absorption and noise reduction, EMC, magnetic isolation, anti-metal interference, and radiation protection in these fields. .

Normally, when attaching a tag to a metal object, a magnetic isolation material must be placed between the antenna and the metal object. In this way, the total thickness of the label will be 0.5 to 3 cm (0.2 to 1.18 inches). In the course of logistics transportation, the goods squeeze and collide with each other, which can easily damage or tear the protruding labels. The designed label has a thickness of less than 3 mm and is directly applied to metal objects, and can even be recessed into the object. One of the reasons why the label can become so thin as a whole is that the traditional antenna is omitted, and the other reason is that it is made of special materials. This material has high electrical permeability, so that the tag chip can receive the weak current from the metal object.

ferrite sheets:https://www.goodsmaterial.com/

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