Global RFID tag for PCB tracking
27 October 2008
RFID tags that can be glued onto a PCB and do not require an electrical connection have been introduced by Abacus.
The Murata Magicstrap RFID tags are claimed to be readable through an instrument case, and as they support global frequencies, it means that electronic systems can be tracked down the supply chain and through their lifecycle.
The tags can use the PCB ground as an antenna, but connect to the antenna pattern via inductive coupling. This is said to eliminate the need for an electrical connection between the tag and the board, and allows the tags to be placed accurately.
Abacus states that legislation on the recycling of electronic systems has created a need to accurately identify individual electronic systems from manufacture through distribution to end customer and disposal. They explain that RFID tags can be updated with new information as a product progresses through the manufacturing and shipment process, and therefore are ideal for this requirement.
Murata’s tag has the RF circuitry embedded so that it can be attached to target boards with no need for RF design. Furthermore, reference designs for the antenna pattern required are available free from Murata.
The Magicstrap antenna circuit is wideband, allowing tags to be read and updated over distances of up to 5m at frequencies of 800 – 1000MHz. This means that the same module and antenna pattern can be used in Europe, USA and Japan. Abacus is initially offering Magicstrap in standard 3216 SMD chip packaging for easy placement on PCBs using standard SMD placement equipment. Other features of the device include integrated 4kV ESD protection in the substrate of the device.
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