Open AccessClosely spaced tri‐band frequency selective surfaces based on split ring slots
Author(s) -
FabianGongora H.,
Martynyuk A.E.,
RodriguezCuevas J.,
MartinezLopez J.I.
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2016.0255
Subject(s) - tunable metamaterials , ring (chemistry) , optics , coupling (piping) , frequency band , resonance (particle physics) , oblique case , concentric , physics , multi band , selective surface , radio spectrum , materials science , stability (learning theory) , geometry , atomic physics , mathematics , telecommunications , bandwidth (computing) , engineering , chemistry , metamaterial , computer science , philosophy , linguistics , metallurgy , organic chemistry , astronomy , antenna (radio) , machine learning
A tri‐band frequency selective surface (FSS) with close band spacing based on split ring slots for y ‐polarised incident waves is investigated. The close band response is obtained by reducing the strong mutual coupling between the closely packed concentric rings through splitting the ring slots and redistributing the location of the surface currents at resonances. To validate the proposed FSS, a Ka band FSS was designed, fabricated and tested. Experimental results showed closely spaced resonances at 27.3, 31.7 and 36.2 GHz. Frequency ratios of 1.16 for the second to the first resonance, and 1.14 for the third to the second one were obtained. Also, good stability is observed for oblique incidence.