Recovering Suppressed Resonance Frequency by Bias Lines in Reconfigurable FSS

• Autor(a) principal: Gomes Neto,Alfredo
• Data de Publicação: 2021
• Outros Autores: Silva,Jefferson Costa e, Fernandes,Diego Cassio Garcia, Duarte,Laryssa Maria de Sousa, Morais,Gabryel Jerônimo de
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Journal of Microwaves. Optoelectronics and Electromagnetic Applications
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-10742021000300464
• topic: Four arms star; reconfigurable FSS; suppressed resonance; varactor

Abstract In reconfigurable frequency selective surface, FSS, bias lines can suppress a resonant frequency. This is a disadvantage, as it reduces a FSS potential application. In this paper, a procedure to recover the suppressed resonant frequency is described. A FSS based on four arms star geometry is considered and its reconfigurability is achieved by the use of varactors, for which bias lines suppress the x polarization resonance. So, dipoles are added to the unit cell geometry recovering this resonance. In order to validate the proposed procedure, a reconfigurable FSS using the varactor SMV1231 (0. 466 pF ≤ Cv < 2. 35 pF) was fabricated and characterized. Numerical and measured results shown a good agreement, confirming that the FSS reconfigurability is preserved and the suppressed resonance recovered.