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Title: Equivalent circuit modeling to design a dual-band dual linear-to-circular polarizer surface
Authors: Naseri, P.
Costa, J. R.
Matos, S.
Fernandes, C. A.
Hum, S. V.
Keywords: Circular polarization
Equivalent circuits
Frequency selective surfaces
Issue Date: 2020
Publisher: IEEE
Abstract: The working principle of a thin dual-band dual-linear to circular polarizer is presented here. This polarizer not only converts incident linearly polarized (LP) waves to circularly polarized (CP) waves in two frequency bands, but it also reverses the handedness of each signal. The electromagnetic behavior of the cell is carefully analyzed and two equivalent circuit models (ECMs) are presented to model the responses of the cell to linearly polarized waves at normal incidence. The ECMs show how utilizing interlayer coupling can be leveraged to achieve reversed CP senses in two bands using a compact design. Analytical formulas are presented to provide initial values of the ECM components including the mutual coupling inductances. We present measurement results that agree well with the full-wave simulation and the ECM results, thus validating the proposed ECM model.
Peer reviewed: yes
DOI: 10.1109/TAP.2020.2963949
ISSN: 0018-926X
Accession number: WOS:000546927200076
Appears in Collections:IT-RI - Artigo em revista internacional com arbitragem científica

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