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

Volume

01

fYear

2013

fDate

23-25 Oct. 2013

Firstpage

412

Lastpage

414

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas & Propagation (ISAP), 2013 Proceedings of the International Symposium on

Conference_Location

Nanjing

Print_ISBN

978-7-5641-4279-7

Type

conf

Filename

6717475