A system having a UHF RFID transceiver is adapted to communicate
exclusively with a single electro-magnetically coupled transponder
located in a predetermined confined transponder operating region. The
system includes a near field coupling device comprising a plurality of
lines connected in parallel with an unmatched load. The near field
coupling device may be formed, for example on a printed circuit board
with a plurality of electrically interconnected traces and a ground
plane. The system establishes, at predetermined transceiver power levels,
a mutual electro-magnetic coupling which is selective exclusively for a
single transponder located in a defined transponder operating region.
Also included are methods for selective communication with the
transponder in an apparatus such as a printer-encoder.