Impedance modeling for a unit cell of the square loop frequency selective surface at 2.4 GHz

Aziz, Mohamad Zoinol Abidin Abd; Shukor, M. Md; Suaidi, M. K.; Ahmad, B. H.; Johar, M. F.; Azmin, Farah Ayuni; Salleh, S. N.; Malek, Mohd Fareq Abd

doi:10.1109/rfid-ta.2013.6694526

Cited by 6 publications

(4 citation statements)

References 11 publications

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“…The first prototype measured was an FSS with circular aperture ring with periodicity p = 30 mm, outer ring diameter d = 25 mm, ring thickness w = 0.5 mm, relative electric permittivity of substrate ɛ r = 4, 4 and substrate thickness h = 0.8 mm. Applying the methodology used in [11], we get N = 0.8 for this FSS. Fig.…”

Section: Measurement Resultsmentioning

confidence: 99%

“…It is common in literature to apply both FWM and ECM. Aziz et al [11] modelled the impedance of a 2.4 GHz resonance squareloop unit cell for applications in the industrial, scientific and medical (ISM) band. The authors based the modelling on the physical parameters of the element, which were obtained by highorder polynomial approximations with the aid of CST software.…”

Section: Previous Workmentioning

confidence: 99%

“…2. [9] square loop combined with a convoluted geometry ECM application of ECM in millimetre wave and new geometry modelling [10] double square loop ECM improvement of the ECM for analysing finite and curved FSS [11] square loop ECM with polynomial fit new procedure to use ECM [12] gridded square loop ECM with analytical procedure to model diodes employment of the ECM for analysing active FSS [13] square-loop patch and slot ECM optimisation of ECM and classical modelling of a slot geometry [14] square-loop patch and slot ECM with transmission line theory application of the ECM to analyse CFSS present ring and concentric rings slots ECM new modelling of two different geometries that can be used in CFSS…”

Section: Circular Ring Aperturementioning

confidence: 99%

See 2 more Smart Citations

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

Silva

Campos

Neto

2020

IET Microwaves, Antennas & Propagation

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In this study, the authors present two new proposals for representation by the equivalent circuit model for aperture‐type circular ring geometries, not yet studied in the literature. The study consists of the frequency response representation of frequency selective surfaces (FSSs) formed by circular ring aperture and concentric circular ring apertures. At first, the authors performed an equivalent circuit analysis for a single cell formed by a single circular ring. Then, they extend the analysis to concentric circular rings, which when used as FSS unit elements, present two passband responses. They compare results of the proposed method with results obtained with the commercial software ANSYS HFSS, showing a good agreement between the results. They built four prototypes and compared measured results with simulated results obtained with the suggested method and it completes the proposed equivalent circuit validation.

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Section: Measurement Resultsmentioning

confidence: 99%

Section: Previous Workmentioning

confidence: 99%

Section: Circular Ring Aperturementioning

confidence: 99%

See 1 more Smart Citation

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

Silva

Campos

Neto

2020

IET Microwaves, Antennas & Propagation

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“…1(b). The grid impedance in this case is a series connection of a grid inductance ( ) and a grid capacitance ( ) as it has been explained in [26]. The grounded dielectric slab can be modeled as an inductance ( ) provided that its thickness is electrically small with respect to the operational wavelength.…”

Section: Description Of the Problem And Initial Designsmentioning

confidence: 99%

Enhancing the angular stability of artificial magnetic conductors through lumped inductors

Álvarez

Cos

Garcia

et al. 2018

Sensors and Actuators A: Physical

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In this paper a novel useful method to efficiently improve the angular stability of AMCs is introduced. Aiming to obtain an AMC with fixed design specifications (resonance frequency, proper bandwidth, maximum size and specific dielectric), the method relies on increasing the grid inductance through the introduction of lumped inductors. To date, lumped capacitors and/or inductors have been used to decrease the unit-cell dimensions. However, to the author's knowledge their potential applications on angular stability enhancement have not been explored yet. The proposed method is applied to non-angular stable AMC comprising square loop-based unit-cells on a RO4003C dielectric. The validity of the method is demonstrated not only through electromagnetic simulations but also using an equivalent circuit model which clearly explains the behavior of the AMC. Moreover, some guidelines are given in order to choose a proper lumped inductance. At the end, comparison with previous literature contributions shows the great potential of this method.

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Design and characteristic impedance modelling of dual band frequency selective surface (FSS) on hybrid material

Shukor

Aziz

Ahmad

et al. 2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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Impedance modeling for a unit cell of the square loop frequency selective surface at 2.4 GHz

Cited by 6 publications

References 11 publications

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

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

Enhancing the angular stability of artificial magnetic conductors through lumped inductors

Design and characteristic impedance modelling of dual band frequency selective surface (FSS) on hybrid material

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