Methods and apparatus are provided for locating one among many items
equipped with RFID tags. The apparatus comprises a portable system
interrogating the RFID tags and receiving responses therefrom that depend
at least on their bearing angle. A comparator selects responses from the
one item and ignores others. An annunciator indicates the presence of the
one item in the interrogator field of view and, desirably but not
essentially, its relative proximity. A directional antenna whose beam
pattern is limited in azimuth and/or elevation provides bearing angle
information. Its field of view becomes progressively smaller as the
antenna approaches the one item so that a user can substantially pinpoint
its location without needing any of the usual RFID infrastructure. Tag
response hit rate and/or signal strength provides range related
information to the interrogator. Optionally, the presence of each new tag
is announced until all new tags have been identified.