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8
Issue
vol 63 / August, 2020
Article

Designing a Spherical Scanner to Study the Spatial Characteristics of Antennas in the Near Zone

A. N. Naumov
ITMO University, Faculty of Control Systems and Robotics; Student


S. Y. Perepelkina
ITMO University, Saint Petersburg, 197101, Russian Federation; Associate Professor


V. A. Poddubny
ITMO University, Faculty of Control Systems and Robotics; Student


P. P. Kovalenko
ITMO University, Department of Mechatronics; Associate Professor


Abstract. Special features of a spherical near-field antenna scanner design for studying spatial characteristics of antennas using the direct-drive approach for both axes of rotation are considered. The designed base of the spherical antenna scanning installation consists of a power bearing frame for placing the scanner design elements, and a base for mounting the signal receiver. The problem of placement of rotary devices is discussed; the devices include the angular node for rotation of the base of the fixed signal receiver in the vertical plane and the azimuth node for rotation of the object of study in the horizontal plane. Calculations of geometric characteristics, strength, rigidity, and stability of the structure are performed.
Keywords: spherical scanner, antenna, direct drive, gearless drive, elevated axis bearing unit, azimuth bearing unit

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