Closed-form representation for equivalent electromagnetic parameters of irregular hexagonal honeycomb radar-absorbing materials
Source abstract
Abstract
In this study, a new closed-form expression is developed to determine the equivalent electromagnetic parameters (permittivity and permeability) of biaxial anisotropic honeycomb radar-absorbing materials (RAMs). Based on the equivalent medium theory, the nonmagnetic substrate and absorbing coating of the honeycomb structure are equivalent to one kind of material, and then, the effective electromagnetic properties of irregular hexagonal (compressed or stretched) honeycombs are obtained by using the layered anisotropic model. In order to validate the effectiveness and correctness of this new closed-form expression, experimental tests and numerical simulation are adopted. The results show good agreement among the experimental tests, numerical simulation, and theoretical analysis within the specified frequency range (2–18 GHz), which confirms the validly of the proposed new method. Compared with the previous layered anisotropic model, the modified new model is more accurate for irregular hexagonal honeycomb RAMs. Furthermore, it can predict the effective permittivity (permeability) precisely without experimental measurements or numerical simulation, and it is of great significance for the design of honeycomb RAMs.
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Research context
OpenAlex topics: Advanced Antenna and Metasurface Technologies · Electromagnetic wave absorption materials · Electromagnetic Scattering and Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Multi-Spectral Absorbing Materials and Structures of Ministry of Education, State Key Laboratory of Electronic Thin Film and Integrated Device, National Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China , Chengdu 610054, China
Funding
National Natural Science Foundation of China · “111” Center · Program for Changjiang Scholars and Innovative Research Team in University
References (30)
Show source-provided references
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