Outras questões num projecto RFID

http://www.rfidjournal.com/article/articleview/1118/1/82/
There is no doubt that the challenges of liquids, metals, refraction, collision and environmental interference cause frequent RFID deployment headaches
The entire front end of an RFID system is a wireless data communication network. The reader is simply a high power radio transmitter and a high sensitivity radio receiver. The tag can be viewed in a similar manner, except it has a low power radio transmitter (backscatter) and a low sensitivity receiver
1. The environment – RFID systems don’t live in a vacuum
…There are electromagnetic waves, radio frequency signals and other noise in your environment that can and will interfere with your RFID system. You need to identify these sources of interference with a spectrum analyzer over a full operational business cycle…
2. The materials – beyond trial and error SKU testing
…Just as the electromagnetic waves from the reader are affected by the environment, the material that tags are placed on will alter their ‘signature’, or radiation pattern, for both transmit and receive…This frequency response characterization (FRC) enables you to scientifically identify optimal tags, placements and remediation strategies.
3. The RFID network architecture – specifications for deployment
…You can see that by measuring how radio waves propagate at certain locations with certain products, you can start with a topology, equipment and configuration that will succeed from the outset….

por Vitor Silva



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