A 13.56 MHz localization system utilizing a switched injection locked transponder

@article{Schafer2009A1M,
  title={A 13.56 MHz localization system utilizing a switched injection locked transponder},
  author={Tobias Schafer and Fabian Kirsch and Martin Vossiek},
  journal={2009 IEEE International Conference on Microwaves, Communications, Antennas and Electronics Systems},
  year={2009},
  pages={1-4}
}
In this paper a low-frequency local positioning system at 13.56 MHz is presented. The system is aiming at short range indoor localization problems, where a measurement through a crowd of people is required. Indoor navigation or information systems e.g. in museums, public buildings or fairs are possible applications. With a wavelength of approx. 22 m the system operates in the near field. Ranging is accomplished by measuring the phase shift between a transmitted CW base station signal and a… CONTINUE READING

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