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Experimental Research Paper | Physics Science | Volume 15 Issue 8, August 2026 | Pages: 1013 - 1019 | India
A Frequency-Selective Absorbing Ground and High-Impedance Surfaces (HIS), Metamaterial
Abstract: Conductor-backed electromagnetic wave absorbers with periodically arranged pattern conductors on the surface layer (pattern absorbers) were designed. The pattern absorbers in this work were composed of a patterned layer acting as a frequency selective surface, such that the pattern served as a resonator together with a back reflector. Electromagnetic wave simulations predicted that the absorption characteristics of these devices could be tuned by varying the shape, alignment, and occupied area ratio of the pattern conductor so as to match the surface impedance to that of free space. Pattern absorbers with various pattern shapes were fabricated operating at 2.45 GHz and their absorption characteristics were evaluated. The experimental results were found to agree with the theoretical predictions and it was experimentally shown that a patterned electromagnetic wave absorber fabricated using a magnetic material exhibited wideband characteristics. A scaling law was also found to hold between the pattern size and absorption center frequency, which will allow the design of electromagnetic wave absorbers that can operate over a wide frequency range with excellent absorbing characteristics. frequency selective surface (FSS)-based electromagnetic absorbers with an insight into their operational principles. Various techniques commonly used to design and develop FSS-based absorbers for several vital metrics are discussed to assess their efficacies and highlight the benefits and limitations of each solution. The absorbers are discussed in light of their major attributes, starting from their evolution to the state-of-the-art. It includes the most popular configurations of FSS-based absorbers-single/multilayer, radar absorbing material, metamaterial, to more recently used active and conformal absorbers. These absorbers can provide absorption bandwidth in both narrowband and wideband frequencies, which find numerous applications throughout the frequency spectrum, ranging from the VHF range to visible light. Some important aspects of the absorber's performance have been highlighted. It includes minimum possible thickness for maximum achievable bandwidth, polarization stability, oblique angle insensitivity, and mitigation of cross-polarized reflection required to design an efficient absorber. Moreover, some of the most popular manufacturing and measurement techniques of FSS-based absorbers are discussed before concluding with some future aspects. In the conclusion, the need for economical electromagnetic absorbers to achieve good absorption performances over a wide range of frequencies is justified. The approaches presented in this article offer a broader view of capabilities and forthcoming developments in this crucial area.
Keywords: Artificial Magnetic Conductor (AMC), Artificial Impedance Surface (AIS), Electromagnetic Absorbers, Frequency Selective Surface (FSS), High Impedance Surfaces (HIS), Metamaterial
How to Cite?: Dr. Sandeep Kumar Prasad, Dr. Ravi Ranjan, "A Frequency-Selective Absorbing Ground and High-Impedance Surfaces (HIS), Metamaterial", Volume 15 Issue 8, August 2026, International Journal of Science and Research (IJSR), Pages: 1013-1019, https://www.ijsr.net/getabstract.php?paperid=SR26728102316, DOI: https://dx.doi.org/10.21275/SR26728102316