论文标题
基于自旋扭转纳米振荡器的时间分辨率快速扫描频谱分析仪的实验证明
Experimental demonstration of a rapid sweep-tuned spectrum analyzer with temporal resolution based on a spin-torque nano-oscillator
论文作者
论文摘要
在实验上证明，通过偏置电压迅速扫描的自旋刺激纳米振荡器（STNO）可用于用于具有复杂多色调光谱的频率操纵微波信号的时间分解光谱分析。频谱分析时间的临界减少来自纳米大小的STNO（1-100 ns）的天然小时常数。该演示是在300 MHz约300 MHz的频率范围内生成的涡旋状态STNO生成的，频率下转换和匹配的过滤用于信号处理。结果表明，这款基于STNO的频谱分析仪可以对多音信号进行分析，并且具有迅速变化的频率组件的信号，并以$μ$ S的时间尺度和频率分辨率限制了仅受“带宽”定理的限制。可以使用具有低时间常数和高振荡频率的任何类型的微型和纳米尺度的频率扫描振荡器来实现提出的快速分辨光谱分析的概念。
It is demonstrated experimentally that a spin-torque nano-oscillator (STNO) rapidly sweep-tuned by a bias voltage can be used for time-resolved spectrum analysis of frequency-manipulated microwave signals with complicated multi-tone spectra. The critical reduction in the time of spectrum analysis comes from the naturally small time constants of a nano-sized STNO (1-100 ns). The demonstration is performed on a vortex-state STNO generating in a frequency range around 300 MHz, with frequency down-conversion and matched filtering used for signal processing. It is shown that this STNO-based spectrum analyzer can perform analysis of multi-tone signals, and signals with rapidly changing frequency components with time resolution on a $μ$s time scale and frequency resolution limited only by the 'bandwidth' theorem. The proposed concept of rapid time-resolved spectrum analysis can be implemented with any type of micro and nano-scale frequency-swept oscillators having low time constants and high oscillation frequency.
