Title :
A composite electromagnetic absorber for anechoic chambers
Author :
Weijia Duan ; Han Chen ; MingMing Sun ; Yi Ding ; Xiaohan Sun ; Chun Cai ; Xueming Sun
Author_Institution :
Nat. Res. Center for Opt. Sensing/Commun. Integrated Networking, Southeast Univ., Nanjing, China
Abstract :
A composite electromagnetic absorber for anechoic chambers is proposed with the structure consisting of a pyramidal foam and a lossy frequency selective surface (FSS) structure. Simulation results show that the period of absorber array and the pyramid base impact directly on absorption nulls, and the effects of pattern size, surface impedance and substrate thickness of FSS are more complicated due to interactions between the pyramidal foam and FSS structure. Two examples are discussed and the results show that improved absorption below 3GHz can be achieved by properly selecting parameters.
Keywords :
anechoic chambers (electromagnetic); frequency selective surfaces; surface impedance; FSS structure; absorber array; absorption nulls; anechoic chambers; composite electromagnetic absorber; lossy frequency selective surface structure; pattern size; pyramid base; pyramidal foam; substrate thickness; surface impedance; Arrays; Reflectivity;
Conference_Titel :
Antennas & Propagation (ISAP), 2013 Proceedings of the International Symposium on
Conference_Location :
Nanjing
Print_ISBN :
978-7-5641-4279-7
