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In this work, a novel, compact, single-port antenna combining both UWB and UHF bands is presented. This solution is proposed for next-generation passive RFID tags, performing communication and localization through UWB technology and efficient energy harvesting in the UHF band, but it is also designed to keep compatibility with previous tags generations. The UWB communication is deployed by means of...
Graphene has become an outstanding material for revolutionary wireless applications in the microwave and terahertz/infrared frequency ranges. Due to its unique physical characteristics, a family of completely new devices can be developed by exploiting graphene's behaviour as High Impedance Surface (HIS) or highly-Reactive Impedance Surface (RIS). In this paper we theoretically investigate first a...
A new bi-dimensional antenna array, based on the Yagi-Uda concept, consisting of two driven elements and two passive elements is designed, for UHF-RFID applications, to fit into the case of a portable device (PDA). The multi-layer printed circuit board (PCB), including metal planes, is arranged in a meander-type configuration to cooperate with the array operation in minimizing back radiation with...
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