RFID Lesson 7

ลงรายละเอียดเรื่องของ tag กันหน่อยครับ

The RFID Tag/Transponder

• IC – integrated circuit with the following components

• Microprocessor with 40 to 50 thousand transistors
• Powered by radio frequency waves
• Memory to store data:

• Read Only, rewriteable, write once read many
• 64 Bits to 4K bits or more depending on IC and frequency
• Can have multiple banks of memory that are addressed separately
• Can have multiple security encoding schemes
• Can have multiple password authentications for security

• Commodity item

• The IC has a strap and two conducting pads that are connected to an antenna
• For Gen 2 the IC’s are mass produced onto a backing that enables high speed conversion into inlays (inlets), labels or packaging materials.
• The antenna is the largest part of the tag and affects the overall size of the tag.

• Designed for specific applications
• Designed for specific frequencies

• Substrate is the material that holds the IC, strap and antenna together on the tag and the inlays.
• The inlay is a sub-assembly of an IC, antenna and substrate and is used to embed into labels or form part of a “finished” tag
• A tag has the prior components plus can have substrate on both sides and an adhesive on one side.
• Encapsulated tags are tags with their inlays encapsulated in an RF friendly material. This is done for protection against the environment, tuning for the material to be attached to, tamper prevention, implementation management and aesthetics.
• Multiple IC’s of different frequencies can be combined in a single form factor for multiple application usage.
• Tags can take many form factors

• Wristbands
• Patient bands
• Glass tags
• Encapsulated
• Buttons
• Keychain tags
• Heat resistant tags
• Metallic tags
• Container tags
• Epoxy tags
• Tickets
• Cards
• Embedded in products or packaging
• Animal tags
• Labels

Some examples of really small tags are shown below:





Gen 2 Button
Encapsulated Tag Glass Animal Tag