Modulation Rate Study in a Spin-Torque Oscillator-Based Wireless Communication System

摘要

We study a wireless communication system based on a magnetic tunnel junction spin-torque nano-oscillator (STNO) by employing amplitude-shift-keying modulation. By varying the pulse modulation frequency ( ) from 1 kHz to 2 MHz and distance () between the antenna from 25 to 150 cm, we show a maximum data rate of 6 Mb/s (at cm and MHz), a limit imposed by our setup and noise generated by the STNO itself. We also report the average amplitude noise () and average white frequency noise () of the wireless communication system and discuss their dependence on the distance between the antennas.