S.A. Loskutov - Ph. D. (Eng.), Associate Professor, Kaluga branch of the Bauman MSTU E-mail: sergeL-75@ya.ru R.O. But - Student, Kaluga branch of the Bauman MSTU E-mail: madara40rus@mail.ru

Most often recently, the antenna devices parameters have been measured in a far-field range. However, traditional far-field range techniques are having several disadvantages and limitations. The disadvantages above, in the first place, are caused by influence of different objects on the cover of anechoic chamber and influence of interference on measurement equipment. Now, to overcome the technical difficulties and to avoid the disadvantages of the far-field range, the measurement in the near-field range of the antenna devices is used. This article discusses aspects of near-field antenna measurements technique implementation, the problems to be solved for its im-plementation: the near-field range scanning of the antenna device, the transmission of the microwave signal from stable generator to the moving measuring antenna, the organization of measuring and computing systems and software development. A block diagram of the experimental equipment that implements the proposed technique was proposed and discussed in detail. It has been shown that a control module is an important structural unit of the described equipment, which provides high accuracy of mechanical movement. These high requirements to the control module can not be implemented without the usage of modern element base, high-performance microcontrollers and techniques of analog-to-digital signal processing. The use of developed equipment along with the software, including a tool for analysis and synthesis of amplitude-phase distribution of the field, allows to choose the optimal manufacturing technology, tuning and testing of antenna devices to assess the accuracy and reliability of the results acquired.

 

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