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The design of wide-bandwidth microwave absorbers is conducted using a square loop-frequency selective surface (SL-FSS) on the surface of the grounded dielectric substrate. The parallel circuit combination of the input impedance of the grounded substrate and the complex impedance of the SL-FSS leads to impedance matching in a broad frequency range. The inductance (L) and capacitance (C) of the SL-FSS...
For the aim of thin electromagnetic wave absorbers used in quasi-microwave frequency band, this study proposes the high-permittivity ferroelectrics of quarter wavelength thickness (λ/4 spacer) coated with ITO thin film of 377 Ω/sq (impedance transformer). For high-permittivity dielectrics, BaTiO3 (BT), 0.9Pb(Mg1/3Nb2/3)O3-0.1PbTiO3 (PMN-PT) and 0.8Pb(Mg1/3Nb2/3)O3-0.2Pb(Zn1/3Nb2/3)O3 (PMN-PZN) are...
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