Ultra Wide Band and Active RFID

What is Ultra Wide Band ?

How come Ultra Wide Band Active RFID can do better position (http://www.rfidjournal.com/article/articleview/1088/1/1/) ?

Thanks,
Andrew
andrewyuAsked:
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jgt10Connect With a Mentor Commented:
Another major aspect of UWB is very short signal lenth (microseconds or shorter.)

These singals are less likely to interfere with the RF equipment that already resides on frequencies UWB proposes to use.  This makes them very attractive for hospitals since they are unlikely to interfere with all of the other electronic equipment.
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LimeSMJCommented:
Ultra-wide band is just another way of communication via radio waves.  Instead of using one or serveral frequency channels (cordless phones, cellphones, radio stations), UWB uses a very large block of frequecies at once.

RFID can either be passive or active.  Passive RFID uses the transmitter's radio energy to track... Active RFIDs have batteries that can transmit on their own.

The only advantage that an active RFID would have is that it wouldn't need to be close to a transmitter to send information - which in turn can improve the tracking capabilities in a large environment.
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