https://orcid.org/0000-0002-3855-8902
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Abstract
This paper discusses the challenges in accurately measuring the far-field performance of array antennas, which have become more complex and larger due to recent trends in increasing the number of elements and the antenna size. The far-field measurement method, which is a general method for measuring a radiation pattern in a far-field, is difficult to be utilized at a high frequency due to limitations in physical chamber size and difficulty in diagnosing an antenna. In order to improve these problems, a near-field measurement method is used as an alternative. Even though using a near-field measurement, the accuracy of the derived far-field pattern is reduced at low elevation angles due to zero-padding of data outside the measurement area. The integration of the near-field measurement with the source reconstruction is a promising approach to enhance the measurement limits of the far-field pattern analysis. This paper aims to extend the previous work to accurately predict the far-field radiation pattern, especially in the low elevation angles. The verification of the proposed method is performed for a standard gain horn and 4 by 4 patch array antennas, with and without beam steering.
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No potential conflict of interest was reported by the author(s).
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Notes on contributors
Ju-Ik Oh
Ju-Ik Oh received the B.S. degree in electronic engineering from the Inha University, Incheon, Republic of Korea, in 2017, and the M.S. and Ph. D degree in electrical engineering from the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea, in 2019 and 2023, respectively.
He has been working at the Time and Frequency Group, Korea Research Institute of Standards and Science (KRISS), Daejeon, since 2023.
His current research interests include time transfer using satellites, millimeter-wave antennas, antenna array systems, and RF front-end design.
Jong-Won Yu
Jong-Won Yu received the B.S., M.S., and Ph.D. degrees in electronic engineering from Korea Advanced Institution Science and Technology (KAIST), Daejeon, Republic of Korea in 1992,1994, and 1998, respectively.
From 1995 to 2000, he worked at Samsung Electronics. He also served Wide Tecom Head and Telson, from 2000 to 2001 and from 2001 to 2004, respectively. In February 2004, he joined as an Assistant Professor with electrical engineering at KAIST, where since February 2006. In February 2006, he worked as an Associate Professor with electrical engineering at KAIST, where since February 2014, he has been a Professor at KAIST.
His research interests emphasize millimeter wave circuit and system, wireless power transfer system, wireless/near-field communication system, and RADAR system.
Young-Dam Kim
Young-Dam Kim was born in Suwon, Korea, in 1988. He received the B.S. degree in electronics engineering from the Ajou University, Suwon, Korea, in 2011, and the M.S. and Ph. D. degree in electrical engineering from the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea, in 2013 and 2017, respectively.
He worked as a senior engineer at the Samsung Electronics Network Business, Suwon, Korea, in 2017. He worked as a postdoc at the KAIST in 2018. He worked as a senior researcher in Agency for Defense Development (ADD) in Korea from 2019 to 2020. He is currently an assistant professor with the department of electronics engineering of Chungnam National University (CNU), Daejeon, Korea.
His current research interests include the analysis of active phased antenna array and electromagnetic scattering problems based on applied computational electromagnetics.