A printer-encoder antenna has to reliably communicate with only one targeted tag among a number of tightly spaced transponders in very close proximity. Moreover, the distance between the encoder and transponder antennas is typically a few millimeters only. Thus, antennas for UHF-RFID printer encoders are more similar to electromagnetic couplers than to antennas, and a specific analysis is required in terms of power transferred by the encoder to the transponder chip. In this paper, a reader antenna identical to the tag antenna is suggested as an optimal solution for meeting the severe requirement on the spatial selectivity of the encoding process.
Optimal antennas for RFID printer-encoders
MICHEL, ANDREA;BUFFI, ALICE
;NEPA, PAOLO;MANARA, GIULIANO
2016-01-01
Abstract
A printer-encoder antenna has to reliably communicate with only one targeted tag among a number of tightly spaced transponders in very close proximity. Moreover, the distance between the encoder and transponder antennas is typically a few millimeters only. Thus, antennas for UHF-RFID printer encoders are more similar to electromagnetic couplers than to antennas, and a specific analysis is required in terms of power transferred by the encoder to the transponder chip. In this paper, a reader antenna identical to the tag antenna is suggested as an optimal solution for meeting the severe requirement on the spatial selectivity of the encoding process.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
