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윤금노(Keum-No Yoon),방재훈(Jae-Hoon Bang),오트건바타르 검보(Otgonbataar Gombo),안병철(Bierng-Chearl Ahn),김상기(Sang-Ki Kim) 한국정보기술학회 2012 한국정보기술학회논문지 Vol.10 No.1
The cylindrical near-field measurement system is widely used for the measurement of antennas with a sharp beam in one plane and a broad one in the other. In this paper a method is proposed for the implementation of a cylindrical near-field measurement system based on a personal computer. The proposed near-field system consists of an anechoic chamber, an antenna rotator, a probe and its scanner, a system controller, a network analyzer, and a system operating program. The near field of the antenna under test (AUT) is measured at constant intervals on a cylindrical surface enclosing the AUT, from which far-zone fields, gain, and radiation patterns of the AUT are obtained. An efficient fast Fourier transform technique is employed for the conversion of the near-zone electric field into the far-zone one. The implemented cylindrical near-field system is employed to measure the characteristics of an X-band horn antenna and a waveguide slot array and its accuracy is verified by comparison with the far-field measurement.