The Design and Preparation of Foam Concrete Absorber for WLAN anti-jamming EMW- absorber

摘要

This paper reports that according to the principle of EMW-absorption, thermal insulating EMW-absorber for building was designed and theoretically simulated of the λ/4 type. The EMW-absorption properties of composites in the band of 2-4 GHz were examined, A maximum absorption of -20 dB at 3 GHz and 80% of bandwidth below -10 dB was achieved under following conditions: using 380Ω/□ resistive film, specimen thickness of 2 cm. Similarly, absorbing materials for 2.45 GHz have successfully designed and prepared, a maximum absorption of -17 dB at 2.45 GHz, and 65% of bandwidth below -10 dB can be reached. New materials can be used for electromagnetic interference protection for WLAN and indoor electromagnetic radiation pollution control.