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How To Choose Right UHF RFID tags In Your Project

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

At present, there are international standards, national standards, industry standards and enterprise standards for UHF RFID port protocols in China. The most popular standards are 6C and 6D standards, namely ISO/IEC 18000-6C(63) and ISO/IEC 18000-6D(64), in addition to the Chinese national standard GB/T 29768-2013, which was officially implemented in May 2014 in China.Global coverage of the UHF electronic tag band definition varies, for example: China's band 840 ~ 844MHz and 920 ~ 924MHz, the EU band 865MHz ~ 868MHz, Japan band 952MHz ~ 954MHz between, Hong Kong, Thailand, Singapore 920MHz ~ 925MHz, the United States, Canada , Puerto Rico, Mexico, South America band 902MHz ~ 928MHz.

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

The direct impact of raw materials on the RF signal: RFID tags on metal have an impact on the RF signal, used in metal objects or a lot of metal influence on the work environment, it is important to use anti-metal electronic tags, that can reduce the impact of metal on the tag data signal, to facilitate the normal use of RFID tags.

UHF RFID tag performance is susceptible to environmental impact, if you need to determine whether the product is suitable for the actual application environment, in the pre-testing stage, must be used directly on the object test performance to have reference value.

2. The influence of the tag recognition distance factors
Reads the distance and the read-write and the antenna also has the direct relation, needs to clarify the label and the read-write antenna the installation position and the angle relation. At the same time, the power selection, antenna gain, polarization mode, radiation angle these parameters belong to the category that needs to be considered.

In the whole RFID system, each detail may affect the actual reading distance, and can finally reach the project requirements, even the feed line (connect the antenna and read-write cable) the length etc. need to be considered in place.

3. The size of the tag knowledge understanding
In our past many project experience, often customers want to label size is small, so that 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 label performance can be designed. With different manufacturers, different model specifications, different production processes for integrated ic and different manufacturing technologies for antennas, there are certain price differences and consumers have to select according to the actual usage and cost budget.

4. Other factor

In addition, there are other details to consider, such as: whether the tag has temperature and humidity resistance and other environmental reliability requirements? How much data capacity is required to be written to the tag? What is the maximum number of tags that need to be read at one time? etc.

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