Application of uhf antenna in jewelry management!Blocking Card manufacturer

　　With the development of the Internet of Things, the application of RFID technology in logistics and warehousing, retail, asset management, personnel management, intelligent manufacturing and other fields has become very common. With the continuous influx of more and more RFID companies and solution providers, explore UHF RFID technology In the application of their respective industries, how to plan the system software and hardware and how to select the hardware has become an urgent matter. Here, we will provide answers to the characteristics of RFID far-field and near-field antennas, and analyze the application of jewelry management to help you understand the selection of RFID UHF antennas.

　　First of all, let’s take a look at the RFID UHF near-field and far-field antennas. How to choose?

　　The understanding of the near field and the far field cannot be simply understood as the literal meaning of near and far. This involves expertise in the transmission and field of radio waves.

　　Radio waves should be called electromagnetic waves or EM waves for short, because radio waves contain electric and magnetic fields. The signal from the transmitter and via the antenna will generate an electromagnetic field. The antenna is the converter and interface for the signal to free space.

　　Therefore, the characteristics of the electromagnetic field vary depending on the distance from the antenna. The variable electromagnetic field is often divided into two parts-the near field and the far field. To clearly understand the difference between the two, it is necessary to understand the propagation of radio waves.

　　Far-field antenna: The identification distance is long, the radiation angle is large, and it is easy to misread the label next to it;

　　Near-field antenna: The identification distance is short, and the radiation is only on the front surface of the antenna. The tag cannot be identified at a long distance, but the tag next to it will not be read.

　　For these two kinds of antennas, the editor takes the application in jewelry management as an example to tell you the main points of RFID UHF antenna selection:

　　One: Prevent cross-reading

　　Because in jewelry management, different types of jewelry are placed on the shelves in different areas; and the jewelry display distance is very close; therefore, the jewelry needs to be recognized in the area; the jewelry can no longer be read from the area, let alone the display next door. Labels in the cabinet and other functions.

　　2: Centralized reading

　　The electromagnetic field is only distributed on the front surface of the antenna, which is due to the special design of the near-field antenna. The loop design of the near-field antenna makes the radiation efficiency of the antenna concentrate on the front surface of the antenna, which makes the recognition effect of multiple tags better, and the radiation angle control is better. The labels on other items on the left and right sides will not be recognized, thus achieving the true meaning of jewelry management.

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