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Hybrid UHF/UWB Antenna for Passive Indoor Identification and Localization Systems

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3 Author(s)
Cruz, C.C. ; Inst. de Telecomun., Tech. Univ. of Lisbon, Lisbon, Portugal ; Costa, J.R. ; Fernandes, C.A.

There is a growing interest for simultaneous identification and centimetre-resolution localization of multiple targets in indoor environments. A hybrid passive UHF/UWB RFID concept has been recently proposed that conciliates the potential from high resolution UWB impulse radio with the typical range from UHF-RFID identification systems. This paper proposes a new planar antenna for hybrid passive tag systems, which operates both in the UHF-RFID band and in the FCC UWB band. The co-designed UHF and UWB antenna elements are printed back-to-back on each side of a common substrate with appropriate topology for future integration with a single UHF-UWB RFID chip. Experimental tests have shown that both UHF-RFID and UWB performance of the hybrid antenna are comparable to available commercial solutions that work just on a single band. The antenna is adequate for low-cost mass production of hybrid passive tags. It aims at low-cost passive RFID systems combining the ability of item identification with precise tracking in indoor environments.

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Antennas and Propagation, IEEE Transactions on  (Volume:61 ,  Issue: 1 )