Recycling ambient microwave energy with broad-band rectenna arrays

  title={Recycling ambient microwave energy with broad-band rectenna arrays},
  author={Joseph A. Hagerty and F.B. Helmbrecht and W.H. McCalpin and Regan Zane and Zoya Popovi{\'c}},
  journal={IEEE Transactions on Microwave Theory and Techniques},
This paper presents a study of reception and rectification of broad-band statistically time-varying low-power-density microwave radiation. The applications are in wireless powering of industrial sensors and recycling of ambient RF energy. A 64-element dual-circularly-polarized spiral rectenna array is designed and characterized over a frequency range of 2-18 GHz with single-tone and multitone incident waves. The integrated design of the antenna and rectifier, using a combination of full-wave… 
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