1. Working principle of RFID reader
First of all, analyze the steps from the working principle. RFID reader (reader writer) can read or write the tag identification code and memory data through wireless communication between the antenna and RFID electronic tag, and realize spatial (contactless) coupling of RF signal between the electronic tag and reader through coupling elements. In the coupling channel, according to the timing relationship, Realize the transmission of energy and the exchange of data.
2. So there are several reasons that affect the recognition distance
The power of the reader can be adjusted by 0-4w generally
The size of the signal transmitting antenna, as well as the adjustment parameters, whether there are some functions such as automatic tuning
Whether the signal attenuation between the reader and the signal transmitting antenna is small enough
Chip receiving sensitivity of tag
Size and parameter matching of label coil
Whether there is metal interference in the environment
3. How to make the recognition distance of RFID reader farther
To increase the power of the reader's host appropriately, we can adopt the design of separate components, add the amplification circuit, and improve the acceptance sensitivity
The receiving antenna with better material shall be matched and adjusted properly
Adjust the relevant parameters according to the environment,
The label chip adopts original authentic products, and the antenna material and base material are stable and reliable
