A single resonance-type spin-torque microwave diode (STMD) can be used as a quadratic detector to determine the frequency f of an external microwave signal when the power Prf of this signal is known. However, unless the signal's frequency f exactly coincides with the detector's resonance frequency fres, there exists a finite frequency determination error Δf. In this letter, we show theoretically and experimentally that if a pair of independent STMDs with different resonance frequencies connected in parallel is used for the signal frequency determination, knowledge of the signal power is not necessary, and the frequency determination error can be substantially reduced to Δf ≈ 30 MHz at the frequency of f ≈ 5.0 GHz.

中文翻译：

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利用一对自旋扭矩微波二极管测量微波信号频率


当外部微波信号的功率 Prf 已知时，可以使用单个谐振型自旋扭矩微波二极管 (STMD) 作为二次检测器来确定该信号的频率 f。然而，除非信号的频率f与检测器的谐振频率fres完全一致，否则存在有限的频率确定误差Δf。在这封信中，我们从理论上和实验上表明，如果使用一对并联的具有不同谐振频率的独立 STMD 来确定信号频率，则不需要了解信号功率，并且频率确定误差可以大大减少到频率 f ≈ 5.0 GHz 时，Δf ≈ 30 MHz。