We present the concept of a passive spin-wave device which is able to distinguish different radio-frequency pulse trains and validate its functionality using micromagnetic simulations. The information is coded in the phase of the individual pulses which are transformed into spin-wave packets. The device splits every incoming packet into two arms, one of which is coupled to a magnonic ring which introduces a well-defined time delay and phase shift. Since the time delay is matched to the pulse repetition rate, adjacent packets interfere in a combiner which makes it possible to distinguish simple pulse train patterns by the read-out of the time-integrated spin-wave intensity in the output. Due to its passive construction, this device may serve as an energy-efficient wake-up receiver used to activate the main receiver circuit in power critical IoT applications.
@article{arxiv.1905.03006,
title = {Nanoscale spin-wave wake-up receiver},
author = {Qi Wang and Thomas Brächer and Morteza Mohseni and Burkard Hillebrands and Vitaliy I. Vasyuchka and Andrii V. Chumak and Philipp Pirro},
journal= {arXiv preprint arXiv:1905.03006},
year = {2019}
}