2023/05/22 by Chen Firestein, Firestein, Chen, Amir Shlivinski +3
Engineering · Physics and Astronomy · #Advanced Antenna and Metasurface Technologies #Applied Physics (physics.app-ph) #Electromagnetic Scattering and Analysis #FOS: Physical sciences #Magneto-Optical Properties and Applications
paper · pdf · doi:10.48550/arxiv.2305.13295
openalex publication_date 2023/05/22 · openalex created_date 2023/05/24 · openalex updated_date 2026/07/28
The classical scenario where a single plane-wave field impinge a Dallenbach absorber is well studied both theoretically and experimentally. However, occasionally a spectrum of plane-waves impinges the absorber. Such a scenario occurs for example if an antenna is located adjacent to the absorbing layer. In this paper, for this scenario we obtain the absorbing performance bound and design an optimized layered absorber that approaches the bound. In a numerical demonstration, we explore a realistic case where a dipole antenna is placed in the vicinity of a finite, electrically thin, Dallenbach absorber backed by a PEC plane in the 6G frequency range. In the absence of the absorbing layer covering the PEC plane, severe scattering from the plane distorts the radiated fields. These distortions are robustly mitigated by the specifically tailored optimal absorber to yield a more desired radiation pattern. Additionally, we propose a metamaterial realization that emulates the required properties of the absorbing layer for all field polarizations.