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This work presents a cooperative power harvesting scheme, collecting power from two or more independent ambient energy sources into a single non-linear component. It is shown that the interaction of uncorrelated signals in a nonlinear device can greatly improve the conversion efficiency of the harvester. This letter proposes and studies a hybrid power harvester working with both microwave radiation...
Matching network insertion losses have usually been overlooked in the development of microwave power harvesters (MPH), being assumed as an unavoidable inherent problem of matching networks. This paper makes use of a simple L-matching network to derive the optimum junction resistance of a rectifying diode and study the tradeoff between power conversion efficiency and matching network efficiency, in...
A very small footprint rectifier designed to support the micro-robotic applications is proposed and presented in this paper. The frequency of 94GHz has been selected as the best tradeoff between receiving antenna size and available transmitter power. To comply with the swarm micro-robotic requirements in which every part should be mass-producible and little sensitive to fabrication tolerance, a wideband...
This paper explores, for the first time, the use of high responsivity heterostructure backward tunnel diodes to enhance the conversion efficiency of ambient microwave power harvesters. Progress in advancing the performance of low power rectifiers has been slowed because the maximum possible efficiency using Schottky diodes has been reached. Measurements of RF-to-DC conversion efficiency at −40dBm/2...
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