Abstract
Layered microwave absorbing structures (MASs) for the suppression of electromagnetic signals are important due to their broadband frequency response. However, optimization of such structures is difficult because several design variables are involved. A method for the efficient design of broadband, layered, magneto-dielectric MASs is based on analytical modeling of the frequency-dependent complex dielectric permittivity ( ${\mathbf \varepsilon_{r}}$ ) and magnetic permeability ( ${\mu} _{r}$ ). The use of an efficient, extended Jaya's algorithm for optimization results in highly feasible values of ${\mathbf \varepsilon_{r}}$ and ${\mu} _{r}$ based on optimal Debye parameters for a specific reflection loss (RL) and a −10 dB absorption bandwidth. The optimization is carried out in the X-band for both single- and dual-layer MASs. Deeper insight is obtained by optimizing RL with and without constraints on absorber layer coating thickness. The results show the effectiveness of the optimization for the design of MASs for practical applications.
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