Article
Dispersion analysis of periodic structures in anisotropic media: application to liquid crystals
Author/s | Alex Amor, Antonio
Palomares Caballero, Ángel Mesa Ledesma, Francisco Luis Quevedo Teruel, Óscar Padilla, Pablo |
Department | Universidad de Sevilla. Departamento de Física Aplicada I |
Publication Date | 2022 |
Deposit Date | 2022-06-30 |
Published in |
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Abstract | This paper presents an efficient method to compute
the dispersion diagram of periodic and uniform structures with
generic anisotropic media. The method takes advantage of the
ability of full-wave commercial simulators ... This paper presents an efficient method to compute the dispersion diagram of periodic and uniform structures with generic anisotropic media. The method takes advantage of the ability of full-wave commercial simulators to deal with finite structures having anisotropic media. In particular, the proposed method ¡extends the possibilities of commercial eigenmode solvers in the following ways:¡ (i) anisotropic materials with non-diagonal permittivity and permeability tensors can be analyzed; (ii) the attenuation constant can easily be computed in both propagating and stopband regions and lossy materials can be included in the simulation; and (iii) unbounded and radiating structures such as leaky-wave antennas can be treated. The latter feature may be considered the most remarkable, since the structures must be forcefully bounded with electric/magnetic walls in the eigensolvers of most commercial simulators. In this work, the proposed method is particularized for the study of liquid crystals (LCs) in microwave and antenna devices. Thus, the dispersion properties of a great variety of LC-based configurations are analyzed, from canonical structures, such as waveguide and microstrip, to complex reconfigurable phase shifters in ridge gap waveguide technology and leaky-wave antennas. Our results have been validated with previously reported works in the literature and with commercial software CST and HFSS. |
Funding agencies | Junta de Andalucía Ministerio de Ciencia, Innovación y Universidades (MICINN). España |
Project ID. | TIC-112
TEC2017-84724-P TIN2016-75097-P RTI2018-102002-A-I00 B-TIC-402-UGR18 P18-RT-4830 PRX19/00025 |
Citation | Alex Amor, A., Palomares Caballero, Á., Mesa Ledesma, F.L., Quevedo Teruel, Ó. y Padilla, P. (2022). Dispersion analysis of periodic structures in anisotropic media: application to liquid crystals. IEEE Transactions on Antennas and Propagation, 70 (4), 2811-2821. |
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