If a bag needs to be tagged, it is sent to a so-called manual encoding station (MES), where a worker reads the flight information and serial number from the bag's bar-coded luggage tag, then writes it onto an
RFID tag using a handheld RFID
interrogator.
If a worker cannot
read the existing bar-code label and write the information to an
RFID tag, he or she manually enters the data into the RFID system, which then moves the bag toward the proper chute for the correct flight.
As the luggage travels along belts that move it through the terminal, the bags' tags are read at six baggage junctions within that terminal. According to Miranda, the system enables Lisbon Airport to divert bags as needed, based on the requirements of security officials. Lisbon airport relies on interrogator antennas provided by
Times-7 RFID, a company based in New Zealand. Antony Dixon, Times-7's CEO, says the challenge for RFID technology in a baggage-handling environment is to optimize the field size, or read zone, without using expensive RF
shielding and large enclosures. Dixon says Times-7 patented
antenna technology provides high performance in a very low profile design and brings important innovations to the challenges of baggage handling.
The airport and its partners fine-tuned the RFID system in 2009, Miranda notes, so the average time to process a transfer bag is now approximately 10 minutes with RFID, with the quantity of baggage-handling errors reduced by as much as 50 percent. Previously, the process could take 30 minutes or more.
Lisbon Airport relies on
Bartsch International baggage tags containing
UPM Raflatac's ShortDipole
EPC Gen 2 inlays made with
Impinj's Monza 3 RFID chips.
Ida Wetche, the marketing manager of Lyngsoe's airport division, says minimal training was required for airport workers, since the system does not include any new user interfaces for employees to learn.