Passive ultrahigh-frequency (UHF) RFID tags are used on baggage. There is no way to boost such a tag’s signal beyond the maximum 4 watts of power allowed by the Federal Communications Commission (FCC).
There is always a chance that a baggage tag might not be read if it is blocked by something composed of metal. The best solution is probably to mount a mobile, battery-powered reader on a cart, and to then read the tags as the bags are placed on that cart.
It might be possible to mount a tag somewhere to identify location, so that you can know tags are being loaded at location A and unloaded at location B.
—Mark Roberti, Founder and Editor, RFID Journal
Do Racing Facilities Use Passive RFID? »