Design and Preparation of Light-Weight Radar Absorbing Material Based on Resistive Frequency Selective Surfaces

2011 ◽  
Vol 335-336 ◽  
pp. 976-980 ◽  
Author(s):  
Liang Kui Sun ◽  
Hai Feng Cheng ◽  
Yong Jiang Zhou ◽  
Wang Jun
Keyword(s):  
Dielectric Substrate ◽  
Experimental Result ◽  
Frequency Selective Surfaces ◽  
Light Weight ◽  
Rigid Polyurethane Foam ◽  
Design And Optimization ◽  
Radar Absorbing Material ◽  
Absorbing Material ◽  
Equivalent Circuit Method ◽  
Frequency Selective

Light-weight radar absorbing material (RAM) based on resistive frequency selective surfaces (FSS) was designed and prepared. The principle of the resonances of the RAM was analyzed by calculating the impedance of the FSS and the grounded substrate according to the equivalent circuit method, and the results show that a wideband absorbing structure can be gained by producing two adjacent resonances. After design and optimization by Genetic Algorithm (GA), the RAM with absorbing bandwidth of 7.5~18GHz below -10dB was obtained, whose thickness is only 3mm. The designed RAM was gained by preparing resistive patches on the grounded dielectric substrate of rigid polyurethane foam using screen painting technology. The density of the absorber is only 0.2g/cm3, the reflectivity was measured and it shows that the experimental result is consistent with the design one.

Research on Absorbing Properties of New Porous Metals Materials with Light Weight

2019 ◽  
Vol 815 ◽  
pp. 42-47
Author(s):  
Zhang Yu
Keyword(s):  
Aluminium Alloy ◽  
High Performance ◽  
Information Leakage ◽  
Light Weight ◽  
Porous Metals ◽  
Metal Base ◽  
Alloy Plate ◽  
Radar Absorbing Material ◽  
Absorbing Material ◽  
Properties Of Materials

The development of electronic science technology makes electromag-netic radiation problems increasingly severe. High-performance absorbing and shielding electromagnetic wave materials with light weight are researched and developed as one of effectiveness methods to restrain electromagnetic radiation and prevent information leakage. The absorbing properties of aluminium foams coating absorbing paint were studied and tested by making use of RCS in “the reflectivity testing measurement of radar absorbing material” of GJB 2038-94 in this work. The effect of absorbent species and metal base structure on absorbing properties of materials was discussed. The results indicate that the absorbing properties of materials coating magnetic dielectric absorbing paint are better than others, and that of the sample CFe are best in 12.0—18.0GHz, while that of the sample CNi’ are optimal in 26.5—40.0GHz; comparing with aluminium alloy plate materials, aluminium alloy foams have some absorbing properties, and after coating absorbing paint, absorbing properties’ improvement of aluminium foams are larger than of aluminium alloy plate that were resulted from complex porous structure mainly of aluminium foams’.

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