This paper describes the concept of sensor networks which has been made viable by the convergence of microelectro-mechanical systems technology, wireless communications and digital electronics. First, the sensing tasks and the potential sensor networks applications are explored, and a review

Cognitive radio is viewed as a novel approach for improving the utilization of a precious natural resource: the radio electromagnetic spectrum. The cognitive radio, built on a software-defined radio, is defined as an intelligent wireless communication system that is aware of its environment

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Abstract not found

Abstract – Nowadays the implementation of highly integrated UHF RFID reader transceiver RF front-ends with excellent performance is demanding and is still challenging. This paper presents a number of design considerations from the system point of view ， including the choice of receiver

present the implementation of a modular UHF reader frontend for a flexible RFID testbed.

performance, a low cost, low power RFID tag with efficient anti-collision technique which provides a large throughput and flexible security mechanism is required. Moreover, the package of tag becomes a bottleneck to further reduce the RFID cost. In RFID reader design, the carrier leakage problem is a

Abstract — In this paper, we discuss antennas and propagation aspects in current passive UHF RFID systems. We consider a “reader-tag-reader ” link and concentrate on each part of it: reader antennas, propagation channel, and tags. We include channel modeling equations and support our discussion

Abstract—In this paper, signal descriptions and formulations for the radio frequency (RF) front-end of a passive backscatter radio frequency identification (RFID) reader working at ultra high frequencies (UHF) are discussed in detail, and a set of design considerations aiming to improve the read

Abstract—A broadband circularly polarized patch antenna is proposed for universal ultra-high-frequency (UHF) RF identifica-tion (RFID) applications. The antenna is composed of two corner-truncated patches and a suspended microstrip line with open-cir-cuited termination. The main patch is fed