Traditional RFID tags have a small chip inside, like a microcomputer. This chip can store information, such as product number, place of origin, etc. Scan it with a mobile phone or special equipment, and you can see the data inside. Common RFID tags usually work in the frequency range of 13.56MHz. Common chips include F08, MIFARE 1K, Ntag215, etc. The memory size ranges from 144 bytes to 1K, and it can be erased and written up to 100,000 times.
Overview of Chipless RFID Tags Technology
How does chipless RFID work?
As the name implies, chipless RFID tags do not have a chip inside. They mainly rely on antenna structure and physical characteristics to transmit information. This tag is like an electronic fingerprint that can be “heard”. When the scanning device sends a specific signal, the tag will reflect a unique echo and be identified.
Although it cannot store a lot of data, because there is no chip, it is cheaper and simpler to make. It can also be printed on soft materials, such as PET plastic, and is suitable for sticking on objects of various shapes.
What are the types of coreless RFID tags?
According to the technical structure, chipless RFID tags can be divided into three categories:
The first category: with basic antenna and encryption components
The second category: integrating encryption and signal reflection functions in one antenna
The third category: the simplest structure, like a printed coil, does not require complex data components
In addition, they can also be divided into first and second generations by generation. The first generation of tags has limited functions and is usually managed independently by a certain brand; while the second generation adopts international standards, has a larger storage capacity and a wider range of use.
Summary
Chipless RFID tags are a low-cost and flexible new identification technology. Although it is not as comprehensive as chip tags, it is thin, soft, and easy to make, which is very suitable for some price-sensitive and batch-use scenarios. In the future, as technology develops, chipless RFID may become an important part of the Internet of Things, medical, logistics and other industries.
If you are interested in RFID tags, whether it is traditional chip tags or the emerging chipless tags, it is worth learning more. Do you want to know which tag is more suitable for your project?
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