Design And Implementation Of Portable Vector Network Analyzer

With the further development and expansion of the next-generation mobile communication technology,the usage scenarios represented by 5G have begun to diversify and gradually penetrate into all aspects of work and life.Correspondingly,the corresponding test and analysis instruments also need to be developed synchronously,which can adapt to increasingly complex test environments.Vector network analyzer is a core test and analysis instrument,which can measure the S-parameter characteristics of active or passive devices,and has an irreplaceable role in the field of RF microwave.The traditional vector network analyzer has a large volume and is not easy to carry.It is only suitable for indoor use and cannot well adapt to the complex and variable field test environment.The portable vector network analyzer has the advantages of small volume power consumption,weight light,and portability,which solves the problem of field testing well.The research goal of this paper is to design a portable vector network analyzer,which can be used for the measurement of S-parameter curves and engineering parameter curves,and has the characteristics of miniaturization and portability.Combined with the research goals of this article,the research content of this article is divided into several aspects.Study the error model of the network analyzer from a theoretical level,and sort out the related calibration methods and steps of the network analyzer.From the overall level,the overall part of the system and the main design indicators are studied,and key device selection and transceiver simulation are performed.Study the decomposition of module functions from the hardware level,and design and implement a comprehensive transceiver platform and signal separation device from the perspective of digital and radio frequency.Research and establish the required drivers from the software level,and write the required host computer display program and transceiver platform for testing.At the algorithm level,the data reading and processing of single-frequency point signals and continuous frequency-sweep signals are studied,and the error model and calibration method suitable for this system are selected to calibrate and compensate the results.Through the above research and design,the S-parameter curves and engineering parameter curves under different DUTs are finally obtained.In the same situation,by comparing the S-parameter curve and engineeringparameter curve measured by standard instruments,we can draw the conclusion of this paper.First,the measurement system implemented in this paper can accurately measure S-parameter curves and engineering parameter curves,which has the advantage of engineering practicability.The second is that the measurement system implemented in this paper realizes the miniaturization of the vector network analyzer and has the advantages of portability.Based on the research objectives and research content of this paper,the S-parameter curve and engineering parameter curve surface measured by this system meet the design requirements and have certain engineering application value.