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利用 Z参数噪声网络等效电路的分析方法 ,得到了用器件 Z参数表示的微波双极晶体管噪声参数的表达式 ,通过对微波低噪声双极晶体管的高频参数进行测试和分析 ,并把器件的网络参数和物理参数相结合 ,来对器件的最小噪声系数进行计算和分析 .
By using the analysis method of Z-parameter noise network equivalent circuit, the expression of the microwave bipolar transistor noise parameter expressed by the Z parameter of the device is obtained. The high frequency parameters of the microwave low noise bipolar transistor are tested and analyzed, The combination of network parameters and physical parameters to calculate and analyze the minimum noise figure of the device.