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This paper presents an overview of the innovative solutions developed within the Italian project GRETA (GREen TAgs and sensors with ultra-wide-band identification and localization capabilities), whose aim is the development of a distributed and comprehensive system for identification, localization, tracking and monitoring in indoor scenarios. The system is based on hybrid UWB-UHF RFID tags, and the...
In this paper we propose an in-depth investigation on energy harvesting solutions from THz to DC, deploying a dedicated laser source in the infrared (IR) region. Planar bow-tie nano-antennas with misaligned monopoles are arranged in both an array and a multi-element architecture, and combined with tunnel diodes for rectification. A highly directive IR laser is adopted as the 84-THz source, and the...
In the field of renewable energy sources, the sun has rightly a predominant role and many techniques have been developed so far to exploit solar energy for power supply and heating. In this paper, we propose an in-depth investigation on a new solution to deploy THz sun radiation in the infrared (IR) region: an array of planar bow-tie antennas with misaligned arms is designed, and tunnel diodes are...
In this paper, we investigate several rectenna architectures to exploit THz energy sources in the infrared (IR) region for a twofold purpose in energy-aware RFID applications: on one hand to harvest from solar energy, on the other hand to wirelessly receive power from dedicated infrared sources on an as-needed basis. The crucial role of the radiating portion is deeply discussed. A tunnel metal-oxide-metal...
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