Open AccessEquivalent circuit model for array of circular loop FSS structures at oblique angles of incidence
Author(s) -
Ramezani Varkani Ali,
Hossein Firouzeh Zaker,
Zeidaabadi Nezhad Abolghasem
Publication year - 2018
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2017.1004
Subject(s) - equivalent circuit , anechoic chamber , loop (graph theory) , oblique case , inductance , series (stratigraphy) , capacitance , partial element equivalent circuit , acoustics , microwave , optics , electronic engineering , engineering , physics , mathematics , voltage , electrical engineering , telecommunications , linguistics , philosophy , combinatorics , paleontology , electrode , quantum mechanics , biology
This study aims to introduce a simple equivalent circuit model of circular loop shaped frequency selective surface (FSS), predicting the plane‐wave transmission characteristics for oblique angles of incidence. The equivalent circuit model is based on a series of basic equations in order to calculate the inductance and capacitance of strip gratings. Through provided relations, the values of circuit elements can be calculated as well. The proposed relations are applied to many circular loop FSSs with different dimensions, and the results are compared with the full‐wave simulations obtained from computer simulation technology microwave studio. Moreover, some comparison graphs between the simulated and analytical resonant frequency for different values of design parameters have been carried out to show the circuit model follows the trend of the simulated responses. Finally, both the FSS structures have been fabricated and measured in an anechoic chamber. A good agreement between the experimental results and the simulated responses demonstrates the validity of the circuit model.