Battery-Free Cellphone

@article{Talla2017BatteryFreeC,
  title={Battery-Free Cellphone},
  author={Vamsi Talla and Bryce Kellogg and Shyamnath Gollakota and Joshua R. Smith},
  journal={IMWUT},
  year={2017},
  volume={1},
  pages={25:1-25:20}
}
We present the first battery-free cellphone design that consumes only a few micro-watts of power. Our design can sense speech, actuate the earphones, and switch between uplink and downlink communications, all in real time. Our system optimizes transmission and reception of speech while simultaneously harvesting power which enables the battery-free cellphone to operate continuously. The battery-free device prototype is built using commercial-off-the-shelf components on a printed circuit board… CONTINUE READING
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