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An UWB low power active transmitter operating in the European UWB band (6–8.5 GHz) is presented, which may find applications in RFID transponders with asymmetric downlink and uplink communication, as well as in others communication devices. It is based on a 7.25 GHz oscillator driven by a base-band pulse generator, and connected to a small size UWB antenna. The oscillator is turned on and off by the...
The goal of the work is to investigate the Radio Frequency (RF) propagation of ZigBee devices operating within a hospital environment to analyze their real indoor behaviour to design healthcare systems. Different Received Signal Strength Inidcation (RSSI) measurement campaigns have been carried out to characterize the main propagation features. On the basis of the experimental results it has been...
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