This work presents the design of an ultra-thin and wide-band electromagnetic absorber based on a resistive Frequency Selective Surface (FSS) etched within a magnetic substrate. The absorber is conceived by layering an FSS characterized by a triple-loop unit-cell between two commercially available magnetic substrates. The bottom layer of the overall structure is grounded by a metallic sheet. In details, the FSS unit-cell comprises three concentric copper loops opportunely loaded with different lumped resistors. The overall total thickness of the absorber is 3 mm. The structure has been thoroughly evaluated by using an equivalent circuit analysis corroborated by precise full-wave numerical simulations. Although the extremely reduced thickness (λmax/16), the structure proves as an effective absorber, with an absorption level exceeding -10 dB from 6.2 to 11.8 GHz, i.e. a 62% fractional bandwidth.
Ultra-Thin Wide-Band Multilayer FSS-Based Magnetic Absorber
Violi, Vincenzo;Brizi, Danilo;Monorchio, Agostino
2024-01-01
Abstract
This work presents the design of an ultra-thin and wide-band electromagnetic absorber based on a resistive Frequency Selective Surface (FSS) etched within a magnetic substrate. The absorber is conceived by layering an FSS characterized by a triple-loop unit-cell between two commercially available magnetic substrates. The bottom layer of the overall structure is grounded by a metallic sheet. In details, the FSS unit-cell comprises three concentric copper loops opportunely loaded with different lumped resistors. The overall total thickness of the absorber is 3 mm. The structure has been thoroughly evaluated by using an equivalent circuit analysis corroborated by precise full-wave numerical simulations. Although the extremely reduced thickness (λmax/16), the structure proves as an effective absorber, with an absorption level exceeding -10 dB from 6.2 to 11.8 GHz, i.e. a 62% fractional bandwidth.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
