We analyze performance of a resonance-type spin-torque microwave detector(STMD) in the presence of noise and reveal two distinct regimes of STMDoperation. In the first (high-frequency) regime the minimum detectablemicrowave power $P_{\rm min}$ is limited by the low-frequency Johnson-Nyquistnoise and the signal-to-noise ratio (SNR) of STMD is proportional to the inputmicrowave power $P_{\rm RF}$. In the second (low-frequency) regime $P_{\rmmin}$ is limited by the magnetic noise, and the SNR is proportional to$\sqrt{P_{\rm RF}}$. The developed formalism can be used for the optimizationof the practical noise-handling parameters of a STMD.
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机译：我们分析了共振型自旋扭矩微波探测器（STMD）在存在噪声的情况下的性能，并揭示了STMD操作的两种不同机制。在第一个（高频）状态下，最小可检测微波功率$ P _ {\ rm min} $受低频Johnson-Nyquistnoise限制，并且STMD的信噪比（SNR）与输入微波功率成比例$ P _ {\ rm RF} $。在第二（低频）状态下，$ P _ {\ rmmin} $受电磁噪声的限制，SNR与$ \ sqrt {P _ {\ rm RF}} $成正比。所开发的形式可以用于优化STMD的实际噪声处理参数。
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