TY - JOUR
T1 - Diagnosis of array antennas using eigenmode currents and near-field data
AU - Konno, Keisuke
AU - Asano, Shohei
AU - Umenai, Tetsuya
AU - Chen, Qiang
N1 - Funding Information:
Manuscript received May 11, 2018; revised July 26, 2018; accepted August 2, 2018. Date of publication August 22, 2018; date of current version October 29, 2018. This work was supported by JSPS KAKENHI under Grant 18K13736. (Corresponding author: Keisuke Konno.) K. Konno, T. Umenai, and Q. Chen are with the Department of Communications Engineering, Tohoku University, Sendai 980-8579, Japan (e-mail: konno@ecei.tohoku.ac.jp). S. Asano is with Japan Post Corporation, Tokyo, Japan. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TAP.2018.2866544
Publisher Copyright:
© 2018 IEEE.
PY - 2018/11
Y1 - 2018/11
N2 - A novel method for the diagnosis of array antennas is proposed in this paper. The current distribution of the array antennas is reconstructed by the proposed method, which is based on the eigenmode currents over the entire array antennas and its near-field data. The eigenmode currents over the entire array antennas are numerically obtained via the method of moments. Only the dominant eigenmode currents are used for the reconstruction of the current distribution of the array antennas to alleviate the ill-posed nature of an inverse problem. The current distribution of the array antennas is reconstructed using the proposed method, and the optimum parameters for the proposed method, i.e., the number of dominant eigenmode currents and the length of a cylindrical scanning surface, are clarified. Finally, the proposed method is applied to the diagnosis of array antennas with abnormal excitations.
AB - A novel method for the diagnosis of array antennas is proposed in this paper. The current distribution of the array antennas is reconstructed by the proposed method, which is based on the eigenmode currents over the entire array antennas and its near-field data. The eigenmode currents over the entire array antennas are numerically obtained via the method of moments. Only the dominant eigenmode currents are used for the reconstruction of the current distribution of the array antennas to alleviate the ill-posed nature of an inverse problem. The current distribution of the array antennas is reconstructed using the proposed method, and the optimum parameters for the proposed method, i.e., the number of dominant eigenmode currents and the length of a cylindrical scanning surface, are clarified. Finally, the proposed method is applied to the diagnosis of array antennas with abnormal excitations.
KW - Antenna diagnosis
KW - eigenmode currents
KW - inverse problem
KW - method of moments (MoM)
KW - source reconstruction
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U2 - 10.1109/TAP.2018.2866544
DO - 10.1109/TAP.2018.2866544
M3 - Article
AN - SCOPUS:85052708486
VL - 66
SP - 5982
EP - 5989
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
SN - 0018-926X
IS - 11
M1 - 8444475
ER -