Effective electromagnetic properties of honeycomb composites, and hollow-pyramidal and alternating-wedge absorbers

Johansson, Martin; Holloway, Christopher L.; Kuester, Edward F.

doi:10.1109/tap.2004.841320

Cited by 96 publications

(37 citation statements)

References 22 publications

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“…To verify the validity of our results, we compared it with the EEPs deduced using strong fluctuation theory by He et al [11] and the Hashin-Shtrikman (HS) theory [18]. Equation (8) was extracted from [11].…”

Section: Discussionmentioning

confidence: 87%

Calculation and Analysis of the Effective Electromagnetic Parameters of Periodic Structural Radar Absorbing Material Using Simulation and Inversion Methods

Ding¹,

Huang²,

Du³

et al. 2016

PIER M

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Abstract-Effective electromagnetic parameters (EEPs) of periodic structures fabricated mainly by carbonyl iron powders are calculated in this paper. A method of inverting the scattering parameters obtained from simulation software was used. The effect of the absorbent volume ratio and the cycle length on EEPs was studied and analyzed. The correlation of the shapes with EEPs was also researched. The empirical formulas were proposed to calculate EEPs, in which the interaction between two adjacent cells was considered. By using this method, any material could be designed as a periodic structure with controlled EEPs, and the values of EEPs were located between the electromagnetic parameter (EP) of air and that of the original material by a specific rule. The EEPs can be used to design new absorbers as the fundamental data of electromagnetic property of some fresh materials.

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Section: Discussionmentioning

confidence: 87%

Calculation and Analysis of the Effective Electromagnetic Parameters of Periodic Structural Radar Absorbing Material Using Simulation and Inversion Methods

Ding¹,

Huang²,

Du³

et al. 2016

PIER M

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“…[29] by using Hashin-Shtrikman (HS) upper bound to estimate the effective dielectric property, where the agreement between the HS upper bound and the finite element method (FEM) results is excellent. The maximum relative error compared to the HS upper bound is less than 1% over the entire interval.…”

Section: Homogenization Methods For Estimating the Equivalent Dielectrmentioning

confidence: 99%

Electromagnetic Optimal Design for Dual-Band Radome Wall With Alternating Layers of Staggered Composite and Kagome Lattice Structure

Pei

Zeng²,

Zhou³

et al. 2012

PIER

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Abstract-In this paper, electromagnetic optimal design is carried out for dual-band radome wall with alternating layers of staggered composite and Kagome lattice structure. The novel wall structure provides broadband transmission capability, along with excellent thermal-elastic properties and mechanical performances for high temperature applications. By optimizing the layer number (n) and the thickness of the whole wall (d), the power transmission efficiency of the novel structure in the frequency range of 1-100 GHz is calculated via boundary value method (BVM) based on electromagnetic theory. The calculation results suggest that if the wall thickness is dimensioned to be 6 mm and the wall structure is designed as 5 layers, the novel structure demonstrates excellent transmission performance. The optimal design results show that the power transmission efficiency is higher than 80% from 1 to 31 GHz in the centimeter wave range and from 59 to 100 GHz in the millimeter wave range, and the average transmission efficiency over the pass band reaches as high as 91%.

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“…Therefore, the radar absorbing performance of the cores can be represented by effective media with the permittivity [22][23] …”

Section: Optimization Model and Equationsmentioning

confidence: 99%

Multi-objective optimization design of radar absorbing sandwich structure

Chen

Pei

Fang

2010

Appl. Math. Mech.-Engl. Ed.

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By introducing a dimensionless parameter to couple the two objectives, weight and radar absorbing performance, into a single objective function, a multi-objective optimization procedure for the radar absorbing sandwich structure (RASS) with a cellular core is proposed. The optimization models considered are one-side clamped sandwich panels with four kinds of cores subject to uniformly distributed loads. The average specular reflectivity calculated with the transfer matrix method and the periodic moment method is utilized to characterize the radar absorbing performance, while the mechanical constraints include the facesheet yielding, core shearing, and facesheet wrinkling. The optimization analysis indicates that the sandwich structure with a two-dimensional (2D) composite lattice core filled with ultra-lightweight sponge may be a better candidate of lightweight RASS than those with cellular foam or hexagonal honeycomb cores. The 2D Kagome lattice is found to outperform the square lattice with respect to radar absorbing.

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Effective electromagnetic properties of honeycomb composites, and hollow-pyramidal and alternating-wedge absorbers

Cited by 96 publications

References 22 publications

Calculation and Analysis of the Effective Electromagnetic Parameters of Periodic Structural Radar Absorbing Material Using Simulation and Inversion Methods

Calculation and Analysis of the Effective Electromagnetic Parameters of Periodic Structural Radar Absorbing Material Using Simulation and Inversion Methods

Electromagnetic Optimal Design for Dual-Band Radome Wall With Alternating Layers of Staggered Composite and Kagome Lattice Structure

Multi-objective optimization design of radar absorbing sandwich structure

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