Design And Implementation Of Vector Network Analyzer Receiver Based On Microwave Multilayer Board

With the semiconductor,microelectronics and integrated circuit and other high-tech industries booming,the application scenarios of vector network analyzer are becoming more and more diversified.At the same time,higher and higher requirements are put forward to the performance and index of vector network analyzer.Receiver as the core component of vector network analyzer will also face more and more design challenges.Good receiver performance is the basis of high efficiency and high precision measurement of vector network analyzer,the appearance of high-end portable vector network analyzer indicates that the development trend of miniaturization and integration is inevitable.There,it is urgent to study the vector network analyzer receiver with high performance and high integration.This paper is to adapt to the miniaturization and integration of vector network analyzer,a wideband RF receiver of 100 k Hz～8.5GHz is designed,four RF channels,one local oscillation channel and four intermediate frequency channels are integration on the single board,which greatly improve the integration degree of receiver.Complete the analysis and design of the RF receiver principle,including reasonable device selection,key circuit design and simulation,at the same time for microwave multilayer circuit board layout and technology is given a reasonable implementation scheme.Finally,the microwave multilayer circuit board is developed and the vector network analyzer loaded into the receiver board is tested according to the design index.In this paper,the receiver of vector network analyzer is studied and optimized in terms of hardware and algorithm,and an improvement scheme is proposed for the dynamic range,test accuracy and test efficiency of the receiver.In order to expand the dynamic range of the receiver,an in-suit extension method of the dynamic range of the vector network analyzer is proposed.By adding low noise amplifier and cross-correlation signal processing method to the link,the dynamic range is extended.In order to improve the test accuracy of the receiver,a two-step calibration method based on the 12-item error model is designed and proposed.At the same time,the adaptor parameters are extracted and embedded.In order to improve the test efficiency,an extended method of S-parameter test frequency points based on interpolation is designed to refine the S-parameter test frequency points of microwave components,so as to improve the test efficiency of vector network analyzer when testing microwave components.The test results show that the frequency conversion gain,return loss,compression point and isolation degree of the 8.5GHz RF receiver designed in this paper all meet the design requirements.After installing the vector network analyzer,the dynamic range and noise base of the whole machine have good performance,and the test function of S-parameter can be realized,which has good engineering practicability.The receiver improvement scheme proposed in this paper the index of vector network analyzer receiver and improves the performance of whole vector network analyzer.