Is this possible—and, if so, who makes such tags?
I assume you are asking if an RFID chip can be connected to two separate antennas in order to create a transponder or tag. The answer is "yes." The Monza X-2K Dura and Monza X-8K Dura, both from Impinj, support two independent antennas—a short-range loop antenna on the circuit board and a long-range dipole antenna inside the electronic device's enclosure. This allows the chip to be read from both the near field (on a manufacturing line, for example) and at long range (within a warehouse). I believe there may be other chips with four pads for connecting two antennas.
—Mark Roberti, Founder and Editor, RFID Journal
Previous Post Can an RFID Tag Provide Information About the Contents of a Box? »