Spin torque oscillator based BFSK modulation

摘要

This work presents a spin torque nano-oscillator (STNO) based binary frequency shift keying (BFSK) modulation schema implemented on a printed circuit board (PCB). Maximal input data rate reaches 20 Mbit/s. Depending on the STNO used, carrier frequency can range from 1 to 10 GHz. Both DC and AC currents flowing through the STNO can be tuned between 0 to 4 mA. Using one magnetic tunnel junction (MTJ) STNO, a 380 MHz frequency shift around the center frequency 9 GHz was observed, when the modulated current was toggled between 1.06 mA and 1.2 mA at a rate of 20 Mbit/s. The PCB with a size of 50 × 55 mm consumes maximal 130 mA at a 5 V supply. This is the first work demonstrating that the STNOs are applicable for BFSK modulation on the wireless application level.