The Research on the Receiver Chain Design of Noise Figure Measurement Function in Vector Network Analyzer

In this paper the author introduces a design approach of noise receiver chain of noise figure measurement function in domestic 3674 vector network analyzer. Noise power reception of noise figure measurement function in the vector network analyzer requires a receiver chain with low noise figure; accurate reception of noise power is the key to ensure low noise figure indicator and large dynamic range of noise receiver. In this paper, the design scheme and technical indicators of noise power receiving chain are discussed. This paper mainly discusses areas such as the noise receiver analog chain, distribution of ADC index, the design scheme of intermediate frequency filtering and the test effect of low noise amplifier using noise figure measurement function.