Generalized Director Approach for Liquid-Crystal-Based Reconfigurable RF Devices Alex Amor, Antonio Palomares Caballero, Ángel Palomares Bautista, Antonio Francisco Tamayo-Domíınguez, Adrían Fernández-González, José M. Padilla De La Torre, Pablo Mathematical model Microwave devices Liquid crystals Wireless communication Anisotropic magnetoresistance Differential equations This letter presents a closed-form integral-equation formulation that models the director tilting in nematic liquid crystals. The proposed formulation is computationally efficient compared to numerical methods and provides a physical insight on the matter. Our previous work is generalized from the one-constant approach to all the possible cases that cover the elastic constants. These constants determine in great extent the electrical properties of the liquid crystal, and subsequently, the response of the reconfigurable devices that take use of it. Therefore, a more precise but still simple modeling of their influence is pursued here. Simulations show good agreement with numerical implementations. In comparison, the error in the estimation is considerably reduced when using the integralequation formulation, specially as the polarization voltage or the dielectric anisotropy decreases. 2025-01-30T11:08:56Z 2025-01-30T11:08:56Z 2019-09-24 journal article https://hdl.handle.net/10481/101290 10.1109/LMWC.2019.2939553 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional