Advanced passive RFID tags integrated with a suite of sensors can play a significant role in the Internet of Things (IOT) ecosystem for longer range sensor applications. Although readers equipped with IPv6 communications capability allow the transfer of data from passive tags to the IOT world, reliable remote powering of such tag/sensor units still is a limiting factor in harsh propagation environments. In this paper we present a hybrid UWB/UHF signaling for reliable long-range tagreader communications in challenging environments such as reflective, absorptive, and cluttered channels.
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