论文标题
使用开放，短，负载和1/8波长电缆作为源阻抗测量噪声参数
Measuring Noise Parameters Using an Open, Short, Load, and 1/8-wavelength Cable as Source Impedances
论文作者
论文摘要
噪声参数是四个可测量数量的集合，这些量确定了正在测试的射频设备的噪声性能。可以通过连接设备输入处的4个或更多源阻抗，通过连接每个源来测量设备的噪声功率，然后求解矩阵方程，从而测量设备的噪声功率，从而提取2端口设备的噪声参数。但是，由于矩阵条目中产生的奇异性，无法使用高反射系数的来源。在这里，我们使用与高反射源兼容的无奇异矩阵详细介绍了一种新的噪声参数提取方法。我们表明，可以使用开放，短，负载和开放式电缆（“ OSLC”）来提取噪声参数，并详细介绍了一种实用的测量方法。 OSLC方法特别适合于低于1 GHz的频率下的低噪声放大器测量，其中替代方法需要物理较大的设备。
Noise parameters are a set of four measurable quantities which determine the noise performance of a radio-frequency device under test. The noise parameters of a 2-port device can be extracted by connecting a set of 4 or more source impedances at the device's input, measuring the noise power of the device with each source connected, and then solving a matrix equation. However, sources with high reflection coefficients cannot be used due to a singularity that arises in entries of the matrix. Here, we detail a new method of noise parameter extraction using a singularity-free matrix that is compatible with high-reflection sources. We show that open, short, load and an open cable ("OSLC") can be used to extract noise parameters, and we detail a practical measurement approach. The OSLC approach is particularly well-suited for low-noise amplifier measurement at frequencies below 1 GHz, where alternative methods require physically large apparatus.
