A Defected Ground Structure Based on Matryoshka Geometry

• Autor(a) principal: Gomes Neto,Alfredo
• Data de Publicação: 2022
• Outros Autores: Silva,Jefferson Costa e, Coutinho,Ianes Barbosa Grécia, Camilo Filho,Saulo Souto, Santos,Danila Araújo, Albuquerque,Bruno Lima Cavalcanti 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=S2179-10742022000200284
• topic: Band-stop; DGS; filter; matryoshka geometry; miniaturization

Abstract A Defected Ground Structure, DGS, based on matryoshka geometry is described in this paper. The proposed DGS geometry is outlined and initial design equations are presented. Four prototypes, with resonant frequencies 2.17 GHz, 2.44 GHz, 2.99 GHz and 3.73 GHz, were designed, fabricated and characterized, observing a good agreement between measured and numerical results. Also, the obtained results demonstrated the initial design equations usefulness. The resonant behavior was analyzed in terms of the current density and it is possible to observe the current density blocked at the resonant frequency. When compared with dumbbell DGS, a reduction in the resonant frequency up to 47.19% is achieved, confirming the matryoshka geometry miniaturization properties. Furthermore, still comparing with dumbbell geometry, DGS based on matryoshka geometry are more selective.