What are the Reasons for RFID Tag Reading Distance Unreadable

1. The advantages of RFID Tag

RFID tag is a non-contact automatic identification technology, which identifies the target object and obtains relevant data by using radio frequency signals, and the identification work does not need manual intervention. As a wireless version of bar code, it has the advantages of waterproof, anti-magnetic, high temperature resistance, long service life, long reading distance, encrypted data on the label, larger storage capacity and free change of stored information, which bar code does not have.

2. The reasons why RFID Tag cannot be read

(1) RFID tag is damaged

There are chips and antennas in RFID Tag, which may fail if pressed by external force or high static electricity, or if the signal receiving antenna of RFID is damaged, it will also cause failure. Therefore, the RFID tag cannot be damaged or torn off by pressure. Generally, high-demand RFID tags are encapsulated in plastic cards to avoid damage from external forces.

(2) Being affected by interfering objects

RFID tags can not pass through metal objects. When the tags are blocked by metal, the reading distance of RFID readers will be affected, and even can not be read at all. At the same time, the radio frequency information of RFID tag is difficult to penetrate water, and if it is blocked by water, the sensing distance will be limited. Generally, the signal of RFID tag can penetrate non-metallic materials such as paper, wood and plastic, and can communicate penetratingly. If the use scenario is special, it is necessary to customize the electronic labels with metal resistance or other characteristics, such as high temperature resistant labels and waterproof labels.

(3) The reading distance is too far

According to different manufacturing processes, different application environments and different RFID readers, RFID tags have different reading distances. As a result, if the reading distance is too far, the reading effect will be affected.