RT Conference Proceedings T1 Circuito equivalente analítico basado en vectores y valores propios para superficies periódicas con ranuras estrechas. A1 Hernández-Escobar, Alberto A1 Mesa, Francisco A1 Esteban, Jaime A1 Abdo-Sánchez, María Elena A1 Martín-Guerrero, Teresa María A1 Camacho-Peñalosa, Carlos K1 Antenas AB In this work, the values of the parameters of the eigenstate lattice network are obtained by using only analytical means. The procedure is applied to a simple structure, consisting of a bi-periodic surface made of a slotted metallic plane. The slot is very narrow and is slightly rotated. The analytical values are obtained by using a multi-mode expansion approach that only requires information about the normalized field in the slot. The equivalent circuit and the procedure are simple and provide physical insight into the structure. Very good agreement is found for analytical values and simulated ones. YR 2023 FD 2023 LK https://hdl.handle.net/10630/27574 UL https://hdl.handle.net/10630/27574 LA spa NO Ministerio de Ciencia, Innovación y Universidades (MCIU), Agencia Estatal de Investigación (AEI) y Fondo Europeo de Desarrollo Regional (FEDER).Junta de Andalucía PAIDI.Unión Europea - NextGenerationEU.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 31 ene 2026