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Antenna Measurement Method in Fresnel Region by \phi -Variation Scanning

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4 Author(s)
Soon-Soo Oh ; Radio Technol. Res. Dept., ETRI, Daejeon ; Joung-Myoun Kim ; Jae-Hoon Yun ; Suk-Youb Kang

The far-field pattern and gain obtained using the far-field measurement method can be highly accurate when the distance between the source antenna and the antenna under test (AUT) satisfies the Rayleigh far-field criterion. In this letter, we propose an improved Fresnel region measurement method that can be applied in a shortened distance between two antennas. The many Fresnel fields required are captured by changing angle phi of the scanning plane. This scanning involves rotating the roll positioners of the source antenna and the AUT in the same direction and by the same amount, and rotating the azimuth positioner in the horizontal plane. The radiation pattern and gain from the simulation and experimental measurements agreed closely with the reference far-field pattern and gain. The proposed antenna measurement method in Fresnel region by phi-variation scanning can be easily applied to most popular far-field measurement systems without any additional cost.

Published in:

IEEE Antennas and Wireless Propagation Letters  (Volume:7 )