Teber, Ahmet2026-02-282026-02-2820252513-0390https://doi.org/10.1002/adts.202500329https://hdl.handle.net/20.500.12403/5898A metamaterial absorber (MMA) designed for the 5G FR2/mmWave bands (24.25-24.45 and 24.75-25.25 GHz) is simulated with CST Studio Suite and fabricated using laser and wet etching techniques. Absorption measurements are performed using horn antennas in conjunction with a vector network analyzer (VNA). The absorber achieves >95.8% absorption under normal incidence for Mode-1, while it exceeds 90% for Mode-2 in the 24.75-25.20 GHz. The simulation results are validated through an electrical equivalent circuit model and experimental data. This absorber presents a promising solution for electromagnetic interference (EMI) reduction and shielding applications. The same structure, scaled from mm to mu m without shape alteration, achieved over 90% absorption in the terahertz (THz) region (24-26 THz), particularly in the 24-25.12 THz range. The THz region, known as the THz gap, presents challenges due to limited THz sources and detectors. However, technologies such as THz non-destructive testing (NDT) offer potential in biomedical, communication, and defense applications. From this perspective, the high performance and scalability to mu m dimensions without changing the shape of the absorber make it suitable for high-frequency EM shielding applications. This dual behavior in the GHz and THz regions offers a versatile advantage due to its varied functionality.eninfo:eu-repo/semantics/openAccess5GabsorbermetamaterialmmWaveTHz non-destructive testing (NDT)Article81010.1002/adts.2025003292-s2.0-105005787460Q1WOS:001491200900001Q2