期刊
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 70, 期 4, 页码 2979-2989出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2021.3137517
关键词
Radiofrequency identification; Antenna radiation patterns; Receiving antennas; Antennas; Transmitting antennas; Impedance; Voltage; Body area network (BAN); far field; near field; radio frequency identification (RFID); spherical modes expansion
A novel method is proposed to accurately determine the operational range of an on-body, passive UHF RFID system operating in the radiative near field based on its far-field radiation patterns. By combining the new algorithm with the simulated or measured stand-alone far-field radiation patterns of the on-body RFID system, a comprehensive and accurate range determination is obtained. The accuracy and improved speed of the novel technique are demonstrated compared to commercial software tools and measurements.
A novel method is presented to accurately determine the operational range of an on-body, passive ultrahigh-frequency (UHF) radio frequency identification (RFID) system operating in the radiative near field, based on its far-field radiation patterns. To this end, an efficient algorithm based on 3-D multipole expansion of the electromagnetic fields is formulated. By combining the new operator with the simulated or measured stand-alone far-field radiation patterns of the on-body RFID system, a comprehensive and accurate range determination is obtained. Compared with commercial software tools and measurements, we prove the accuracy and improved speed of the novel technique.
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