Equivalent circuit model for analysis of frequency selective surfaces with ring and double concentric ring apertures

Silva, Bruno Sátiro da; Campos, Antônio Luiz P. S.; Neto, Alfrêdo Gomes

doi:10.1049/iet-map.2019.0760

Cited by 12 publications

(10 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The CFSS proposed in this work is based on two geometries modelled by the equivalent circuit method, in previous works [10, 18].…”

Section: Previous Work On Ecm Modellingmentioning

confidence: 99%

“…The Equations represent the inductive and capacitive interactions between cell elements for double rings and CF is [10]:

normalC normalF = \frac{\int_{- \frac{d}{2}}^{\frac{d}{2}} ([] (\frac{d}{2}) - \sqrt{{((), \frac{d}{2})}^{2} - x^{2}}) d x}{d}

…”

Section: Previous Work On Ecm Modellingmentioning

confidence: 99%

“…The proposed new equivalent circuit model for a frequency selective surface formed by double circular ring apertures was presented in ref. [10]. Figure 1 illustrates the unit cell of the double circular ring apertures and its physical dimensions.…”

Section: Previous Work On Ecm Modellingmentioning

confidence: 99%

“…When in resonance, the frequency responses of both layers interact and can produce rejection bands with very close resonant frequencies. The substrates used are generally thin so that there is electromagnetic coupling between the layers, presenting very specific frequency domain characteristics, such as multiband response, great angular stability, and polarisation independence [10].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A tri‐band complementary frequency selective surface with very closely spaced resonances

Silva

Campos

Sousa

et al. 2022

IET Microwaves Antenna & Prop

Self Cite

View full text Add to dashboard Cite

This paper presents a tri‐band complementary frequency selective surface (CFSS) with very closely spaced bands and angular stability. The proposed CFSS element geometry is composed of double concentric rings. The choice of this geometry is because of its very good angular stability. The gap between resonance frequencies is very close, only 404 MHz from the first to second band and 202 MHz from the third to second, which is only possible because of the use of CFSS. The CFSS simulation is performed using HFSS software and the design used the equivalent circuit method. The simulated results are compared with the experimental ones for validation purposes. A very good agreement is observed between the simulated and measured results.

show abstract

“…The CFSS proposed in this work is based on two geometries modelled by the equivalent circuit method, in previous works [10, 18].…”

Section: Previous Work On Ecm Modellingmentioning

confidence: 99%

“…The Equations represent the inductive and capacitive interactions between cell elements for double rings and CF is [10]:

normalC normalF = \frac{\int_{- \frac{d}{2}}^{\frac{d}{2}} ([] (\frac{d}{2}) - \sqrt{{((), \frac{d}{2})}^{2} - x^{2}}) d x}{d}

…”

Section: Previous Work On Ecm Modellingmentioning

confidence: 99%

Section: Previous Work On Ecm Modellingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A tri‐band complementary frequency selective surface with very closely spaced resonances

Silva

Campos

Sousa

et al. 2022

IET Microwaves Antenna & Prop

Self Cite

View full text Add to dashboard Cite

show abstract

“…Equivalent circuit models (ECMs) for FSS based on a single ring slot as well as two concentric ring slots have been investigated and closed-form expressions to calculate the circuit parameters are provided in [32]. However, these expressions are difficult to extend for a unit cell with six concentric ring slots due to the complexity of the geometry, and most important, because of the strong mutual coupling due to the close spacing between rings.…”

Section: Equivalent Circuit Model For Fss Based On Concentric Ring Slotsmentioning

confidence: 99%

Close Band Spacing Pentaband Frequency Selective Surfaces Based on Concentric Ring Slots

Martinez-Lopez

Martynyuk

et al. 2021

IEEE Access

View full text Add to dashboard Cite

This paper presents a polarization insensitive frequency selective surface (FSS) based on concentric ring slots with five closely spaced passbands. The proposed FSS unit cell contains five ring slots coupled with a supplementary innermost ring slot. The close band response within the first five transmission bands is achieved by the influence of the modified geometry obtained with the inclusion of the sixth ring slot. This added ring slot causes the appearance of a stopband, due to the conductive ring between the fifth and the sixth ring apertures, and a passband produced inherently by the sixth ring aperture. The effect of the additional stopband and passband in the FSS response has been investigated in the paper. Fullwave simulations reveal that a modified geometry with proper sizes effectively enables the close band response of the pentaband FSS. To validate the proposed approach, a 729-element penta-bandpass FSS prototype operating at millimeter-wave frequencies has been designed, fabricated, and tested. Experimental results in a free-space measurement setup indicate resonances at f1 = 26.7, f2 = 29.8, f3 = 33.6, f4 = 38.1, and f5 = 44.2 GHz, with resonant frequency ratios of f2/f1 = 1.12, f3/f2 = 1.13, f4/f3 = 1.13, and f5/f4 = 1.16. This FSS demonstrates an extremely low ratio of the highest and the lowest resonant frequencies (f5/f1 = 1.66) for a penta-band operation. This polarization insensitive FSS demonstrates good performance at oblique angular incidence for elevation angles up to 45°.

show abstract

RETRACTED ARTICLE: Quad-band planar frequency selective rasorber with T-A-A-T operating mode and high oblique incidence stability

2023

View full text Add to dashboard Cite

Equivalent circuit model for analysis of frequency selective surfaces with ring and double concentric ring apertures

Cited by 12 publications

References 13 publications

A tri‐band complementary frequency selective surface with very closely spaced resonances

A tri‐band complementary frequency selective surface with very closely spaced resonances

Close Band Spacing Pentaband Frequency Selective Surfaces Based on Concentric Ring Slots

RETRACTED ARTICLE: Quad-band planar frequency selective rasorber with T-A-A-T operating mode and high oblique incidence stability

Contact Info

Product

Resources

About