Modeling Pyramidal Absorbers Using the Fourier Modal Method and the Mode Matching Technique

Fallahi, Arya; Enayati, Amin

doi:10.1109/temc.2016.2533720

Cited by 13 publications

(15 citation statements)

References 32 publications

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“…The methods of homogenization and Riccati formulas were used for theoretical model of wedge and pyramid absorber arrays. Fallahi and Enayati [3] made the efficient and robust analysis of absorber with R-matrix Fourier modal method and the mode matching of fields. Kubytskyi et al [4] addressed the fast optimization algorithms of homogenized equivalent structure.…”

Section: Introductionmentioning

confidence: 99%

Development of millimeter-wave EM absorber with homogenization theory

Zhu

Liu

Zhang³

et al. 2019

SN Appl. Sci.

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Millimeter-wave pyramidal absorber with working frequency from 18 to 40 GHz was developed in this study, which is suitable for anechoic chambers for 5G wireless terminal measurement. Since full-wave numerical method is a time-consuming process to optimize the performance of wave absorber, a theoretical model based on homogenization theory was developed for fast analysis of the reflectivity of absorber with arbitrary shape. In order to validate the theoretical model, absorbing performance was obtained by both theoretical approach and electromagnetic (EM) simulation, respectively. The effects of design parameters, like geometry and foaming ratio on the EM performance, were investigated. A 300 mm by 300 mm conical absorber made of carbon black-filled expanded polypropylene achieves reflectivity around − 40 dB to − 60 dB in working frequency band. The experimental results also prove that the theoretical solution can predict the performance of design with excellent accuracy.

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Section: Introductionmentioning

confidence: 99%

Development of millimeter-wave EM absorber with homogenization theory

Zhu

Liu

Zhang³

et al. 2019

SN Appl. Sci.

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“…Table 1 is given as an example [20]. Finally, depending on the operating frequency range, NRI arch, waveguide, coaxial line, time-domain method, and free-space approach can be used for the performance evaluation of the absorbers [17,21]. The test procedures are specified in IEEE Standard 1128 [22].…”

Section: Analysis and Design Of Absorbers For The Electromagnetic Compatibility Applicationsmentioning

confidence: 99%

“…Moreover, using a matching layer between the pyramidal and ferrite absorbers is another method. Fourier analysis and the mode-matching technique have been used to analyze this absorber efficiently [17]. Note that when several thousands of hybrid absorbers with complex material parameters are used in the facility design, a thin-surface impedance sheet with the same reflectivity can be used to provide time and memory efficiency instead of simulating the hybrid absorber.…”

Section: Hybrid Absorbersmentioning

confidence: 99%

“…In all cases, the metallic backside prevents wave transmission [5]. Unit cell analysis, transmission-line model, homogenization method, finite difference time domain (FDTD) technique, and mode-matching technique are some of the approaches that have been used for the performance prediction of the absorbers [13][14][15][16][17][18]. In this chapter, the analysis and design of some important types of EMC absorbers are reviewed.…”

Section: Introductionmentioning

confidence: 99%

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Analysis and Design of Absorbers for Electromagnetic Compatibility Applications

Raad¹

2022

Recent Topics in Electromagnetic Compatibility

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Absorbers are one of the key components in the realm of electromagnetic compatibility. Depending on the frequency range of interest, different types of absorbers can be utilized for this purpose. This chapter introduces the analysis and modeling of ferrite-based absorbers for low-frequency applications (below 1 GHz) and discusses the issues encountered in their installation, resulting in air gaps. Later, different kinds of pyramidal absorbers, commonly used in the broadband microwave frequency range (above 1 GHz), are presented, and analytical and numerical approaches for predicting their performance are reviewed. The combination of the ferrite tile and pyramidal dielectric absorbers is also provided. Then, some practical aspects of designing hybrid absorbers, including the influence of carbon loading and matching layer on their performance, are mentioned. Finally, the absorber operating frequency extension to the millimeter-wave spectrum using metamaterial structures or graphene material is presented.

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“…Pyramidal absorbers are the most famous and used radar absorbing structures due to their high performance over a wide frequency range [12], [13]. For environments where space demand is not 2 an important factor, the volume of pyramidal absorbers does not become a critical issue.…”

Section: Introductionmentioning

confidence: 99%

Absorb/Transmit Broadband Type Frequency Selective Surface

Neto

Campos

Lira

et al. 2023

J. Microw. Optoelectron. Electromagn. Appl.

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Frequency Selective Surfaces (FSS) are increasingly being used in telecommunications systems due to the numerous advantages presented by this sort of structure, among them low cost, ease of fabrication, and low profile stand out. This work reports the design, fabrication, and characterization of a multilayer frequency-selective absorber (FSA) for broadband operation. The proposed structure shows an absorption performance (operating in the frequency range between 2 GHz and 6 GHz) within the transmission band. The absorber consists of cascaded frequency selective surfaces, which are composed of both conductive square loops, which reflect incident signals, and resistive ones, which act as an absorbing layer. To verify the absorbing structure performance, full-wave numerical simulations and measurements are presented. The measured results are in good agreement with the numerical ones and show that the design performs absorption above 80% within the range of 2.48 GHz to 6.13 GHz, which verifies the project properties. Besides that, numerical results show that the proposed absorber has a proper response under oblique incidence up to 30 • .

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Modeling Pyramidal Absorbers Using the Fourier Modal Method and the Mode Matching Technique

Cited by 13 publications

References 32 publications

Development of millimeter-wave EM absorber with homogenization theory

Development of millimeter-wave EM absorber with homogenization theory

Analysis and Design of Absorbers for Electromagnetic Compatibility Applications

Absorb/Transmit Broadband Type Frequency Selective Surface

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