Akademik Veri Yönetim Sistemi
4th International Conference on Advanced Engineering Technologies, Bayburt, Türkiye, 28 - 30 Eylül 2022, sa.34, ss.964
Metamaterials are structures with extraordinary properties such as artificial geometry
and negative refraction. In recent years, these materials have been used to improve
the performance of various microwave devices such as antenna, sensor, cloak,
polarization converter with the advantages of easy production. Microwave absorbers
are devices that prevent the transmission and reflection of electromagnetic waves.
With these aspects, they can be used in applications such as reducing the radar crosssectional area and antenna side lobes. Metamaterial absorbers have been realized for
wide bandgap as a complex using materials such as thin films, optically transparent
materials, lumped elements. For less complexity, dielectric substrate and SRR
(spling ring resenator) structures were performed for the millimeter and THz
frequency regions. Therefore, materials such as FR-4, rogers, F4B were chosen as
substrates in the design of metamaterial absorbers. In this study, a metamaterialbased penta band absorber was designed. In the proposed design, FR-4 was chosen
as the substrate, with a thickness of 1.6 mm and a dielectric coefficient of 4.3. The
lowest layer of the proposed design was terminated with metal so that the S21
parameter was zero. The highest level of the absorber was formed from the
metasurface with a conductivity of 5.8.107 S/m. The design was simulated with the
CST microwave program. The results showed that more than 90% absorption was
achieved at the resonance frequencies of 3.06 GHz, 6.2 GHz, 18.48 GHz, 22.09 GHz
and 24.71 GHz. MATLAB program was used to obtain the results.