Radio Frequency Mixer Based on Magnetic Skyrmion

Abstract

A radio frequency (RF) mixer constructed by skyrmion‐based spin transfer nano‐oscillator (STNO) is proposed. The skyrmion oscillator is treated as an information carrier and one of the input signals, and a perpendicular microwave field acts as another input signal. It is demonstrated that skyrmion‐based RF mixer can transmit two input signals to an output signal with multiple new frequencies, which are equal to the sum and difference of input frequencies. Through micromagnetic simulations, it is found that the frequency of output signals is modulated by the amplitude of input microwave field as well as the current density applied in skyrmion oscillator and by other magnetic parameters of oscillator (such as magnetic anisotropy). Compared with conventional RF mixer with nonlinear element, such as diode, the skyrmion‐based RF mixer integrates both input signals and output signal functionality with nanometer size, which is more efficient and shows significant potential application in the RF multiplication devices, integrated electronics, and microwave generators.