The Global Leading Device Manufacturer of 2.4GHz RFID & UHF
How to choose UHF RFID readers in the project?

February 22,2022.

The market application scenarios of UHF RFID readers are quite broad, with the advantages of being able to read multiple tags at one time, long identification distance, fast data transmission speed, high reliability and life, and resistance to harsh outdoor environments. It can be used for asset management, production line management, supply chain management, warehousing, anti-counterfeiting traceability of various items (such as tobacco, alcohol, medicine, etc.), retail, vehicle management, etc.

At present, the common UHF RFID air interface protocols in China include international standards, national standards, industry standards, and enterprise standards. The most popular standards are the 6C and 6D standards, namely ISO/IEC 18000-6C(63), ISO/IEC18000-6D(64), and the Chinese national standard GB/T 29768- 2013.

The frequency band definitions of UHF electronic tags are different in the world, for example: China's frequency band 840~844MHz and 920~924MHz, EU frequency band 865MHz~868MHz, Japan frequency band 952MHz~954MHz, Hong Kong, Thailand, Singapore 920MHz~925MHz , the frequency band of the United States, Canada, Puerto Rico, Mexico, and South America is 902MHz~928MHz.

1. Environmental issues of label application Especially for UHF RFID products, metals and liquids have a greater impact on their performance. Therefore, the application environment is metal or non-metal, liquid or plastic, glass, wood, etc., is the primary consideration.

The direct influence of raw materials on the radio frequency signal: Metal has an impact on the radio frequency signal of the RFID reader. When used in metal objects or in a working environment with a lot of metal influence, it is necessary to use anti-metal electronic tags, so as to reduce the influence of metal on the data signal of the tag. , to facilitate the normal use of long range RFID reader.

The performance of UHF RFID reader is easily affected by the environment. If you need to determine whether the product is suitable for the actual application environment, in the early test stage, the performance must be directly tested on the object to have reference value.

2. Factors affecting the label recognition distance The reading distance is also directly related to the reader and the antenna. It is necessary to clarify the installation position and angle relationship between the tag and the antenna of the reader. At the same time, parameters such as power selection, antenna gain, polarization mode, and radiation angle all belong to the categories that need to be considered.

In the whole RFID system, every detail may affect the actual reading distance, and whether it can finally meet the project requirements, and even the length of the feeder (the cable connecting the antenna and the reader) needs to be considered in place.

Third, the understanding of the size of the label In many of our past project experiences, customers often want the labels to be small in size, so that they are both good-looking and easy to install.

However, the size of the label is precisely one of the main factors that determine the performance of the label. Generally speaking, the larger the size, the better the performance of the label can be designed. The manufacturer, the model and specification are different, the production process of the integrated IC and the manufacturing technology of the antenna are different, and the price is different. Consumers should follow the Actual usage and cost budget for selection.

4. Other Considerations In addition, there are other detailed considerations, such as: Does the reader have environmental reliability requirements such as temperature and humidity resistance? How much data capacity does the reader need to write? What is the maximum number of reader that need to be read at one time? Etc...

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