Abstract—Numerical calculations of the matching of a resonant radio absorber (RA) have confirmed that the ideal matching of such an RA with free space can be realized using practically any dielectrics with losses at any desired frequency. The conditions are considered that provide the widest matching band of the RA, and it is shown that the ratio of the bandwidth to the RA thickness (bandwidth to thickness ratio) is about 3.7, i.e., more than for the usual single-layer Dallenbach RA (about 3.2).
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The study was carried out with budgetary funding from a state task of Kotelnikov Institute of Radio Engineering and Electronics (Fryazino Branch), Russian Academy of Sciences. Part of the study was done at Tomas Bata University in Zlin (Czech Republic) under project FW 010100327 “Development of an Advanced Technology for Polymer Composite Materials.”
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Kazantsev, Y.N., Babayan, V.A., Kazantseva, N.E. et al. Frequency Control of a Resonant Radio Absorber with a Free Space. J. Commun. Technol. Electron. 66, 386–390 (2021). https://doi.org/10.1134/S1064226921040057