9/1/2023 0 Comments Unity model free![]() ![]() To enlarge the bandwidth, two of the most used techniques consist of incorporating resonating elements working at nearby frequencies arranged on the same plane or stacked on several layers. Extensive research on narrow band, multiband and large band Metamaterial Absorbers (MAs) have been published. Broadband capability in defense and EMC applications of MMs is limited by their resonant structures providing narrow bandwidth. Nowadays, absorbers are required for Electro-Magnetic Compability (EMC) and stealth (radar cross section) applications. ![]() MMs are also useful candidates for electromagnetic wave absorbers. MMs have been deployed for several applications such as compact antennas, invisible cloaking, super lenses and sensing to name but a few. MMs are no longer only a research field they have now in fact proven to be successful in industrial solutions. , various metamaterial-based applications have been developed covering low to optical frequencies. Since the first successful experimental work on Metamaterials (MMs) reported by Smith et al. Furthermore, with the proposed original UUSR resonating element, the operational bandwidth to thickness ratio of 6.43 is obtained making the proposed UUSR very competitive. After fabricating the structure, the measurements were found to be in good agreement with the simulation results. The physical insight of how the three near unity absorption peaks are achieved has also been discussed. To understand the absorption mechanism, the transmission line model of an absorber and the three near unity absorption peaks at 5.87 GHz, 7.16 GHz and 8.82 GHz have been used to study the electric and magnetic fields. The structure is 12.7 times thinner than the wavelength at the center frequency. An original optimized Underlined U shape has been developed for the resonating element which provides a broadband co-polarization absorption. Our contribution and the challenge of this work is to achieve broadband absorption using a very thin single layer dielectric and it is achieved by rotating the resonating element by 45°. Under normal incidence, it achieves at least 90% of absorption from 5.6 GHz to 9.1 GHz for both Transverse Electric (TE) and Transverse Magnetic (TM) polarizations. ![]() In this article, a single layer co-polarization broadband radar absorber is presented. ![]()
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