TY - GEN
T1 - Modeling and analysis of quasi-periodic arrays
AU - Li, Maokun
AU - Dang, Xunwang
AU - Liu, Tong
AU - Yang, Fan
AU - Xu, Shenheng
AU - Boag, Amir
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/10/11
Y1 - 2017/10/11
N2 - Planar quasi-periodic arrays are widely used in many electromagnetic devices such as metasurfaces, reflectarray antennas, nano particle arrays, etc. They comprise similar elements located on periodic grids. In this work, we compare the reflection phase of elements in the array between the designed value and the practical one. This difference is mainly because real quasi-periodic arrays break the periodicity assumption used in computing the designed element phase. To study this error, we develop a formulation based on Floquet theory to compute the reflection phase of a unit-cell in a practical array. We observe that the error can be significant for elements with high-Q resonances and can deteriorate the performance of reflectarray antennas or metasurfaces. As a remedy, we develop a workflow for element phase correction based on full-wave simulation of the entire array. An improvement in performance is observed for arrays with high-Q resonances.
AB - Planar quasi-periodic arrays are widely used in many electromagnetic devices such as metasurfaces, reflectarray antennas, nano particle arrays, etc. They comprise similar elements located on periodic grids. In this work, we compare the reflection phase of elements in the array between the designed value and the practical one. This difference is mainly because real quasi-periodic arrays break the periodicity assumption used in computing the designed element phase. To study this error, we develop a formulation based on Floquet theory to compute the reflection phase of a unit-cell in a practical array. We observe that the error can be significant for elements with high-Q resonances and can deteriorate the performance of reflectarray antennas or metasurfaces. As a remedy, we develop a workflow for element phase correction based on full-wave simulation of the entire array. An improvement in performance is observed for arrays with high-Q resonances.
KW - integral equation
KW - quasi-periodic arrays
KW - reduced basis method
KW - reflectarray antena
UR - http://www.scopus.com/inward/record.url?scp=85035147190&partnerID=8YFLogxK
U2 - 10.1109/ICEAA.2017.8065427
DO - 10.1109/ICEAA.2017.8065427
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AN - SCOPUS:85035147190
T3 - Proceedings of the 2017 19th International Conference on Electromagnetics in Advanced Applications, ICEAA 2017
SP - 998
EP - 1000
BT - Proceedings of the 2017 19th International Conference on Electromagnetics in Advanced Applications, ICEAA 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 19th International Conference on Electromagnetics in Advanced Applications, ICEAA 2017
Y2 - 11 September 2017 through 15 September 2017
ER -