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Development of microwave noise parameters automatic verification system

Author: ZhangXiYang
Tutor: TianShuLin；LiHongJun
School: University of Electronic Science and Technology
Course: Instrumentation Engineering
Keywords: Microwave Noise Y factor Automatic test system Uncertainty
CLC: TP274.4
Type: Master's thesis
Year: 2008
Downloads: 35
Quote: 0
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Abstract


Any electronic equipment will generate noise, noise is an important parameter in radio measurement, accurate measurement of noise parameters to ensure the successful completion of the missiles, satellites, launch, and many other scientific research and experiments plays a vital role. The main work of this paper is based on the specific needs of the final assembly measuring and testing center to carry out noise parameter value transfer, the development of microwave noise parameter automatic verification system, to achieve noise measurement automation, standardization and standardization to ensure stable performance and the accuracy of the measurement noise equipment, metrological verification of addressing the noise test project, the time is long, complex instrument operation, a large amount of data and dealing with complex issues such as. This paper analyzes the current development status of the noise parameter measurement noise parameters related concepts and the composition of the noise measurement equipment, a detailed discussion of the principles and methods of noise measurement, particularly in-depth exposition on the system using the Y-factor method. Composition, characteristics of the automatic test system is analyzed and compared various bus technology of to constitute automatic test system based prospected the same time, the development of automatic test system. This article on the Centre to carry out the verification of the noise parameters specific implementation methods were introduced and discussed in detail the test method and the principle of the solid-state noise source test device and noise figure analyzer verification device, automatic verification system based on the overall design thinking clearly the system is stable and reliable, open and flexible and simple overall objective to develop a hardware connection scheme. This article focuses on the software of the system implementation process is described in detail, a comprehensive introduction to the functions and features of the software. Latest software systems in the Microsoft Visual Studio. NET platform using C # language development is complete, modular programming approach modeling and relational database organize data so that the system structure is clear, structured. The system command variable flexible instrument programmed command is not unified problem is solved through the establishment of the instrument library, which greatly extends the range of applications of the system, enhance the portability of the system. The article also analyzes some of the problems encountered in the software development process, and propose appropriate solutions. Finally, the noise of automatic verification system overall performance validation, conducted a comprehensive analysis of the uncertainty of the test project measurement results, according to the National Military Standard 2725A-2001 system were repeatability and stability assessment, and test results with superior the test department traceable results, the deviations are within the allowable range, the results fully shows that the system is reliable. Simple to use, easy expansion, easy to transplant the principles identified in the beginning of the bear issues discussed in this article content highly versatile automated test noise parameters, automatic test system developed at the same time also a good reference significance.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system > Centralized testing and roving detection system
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