PREPARATION AND MICROWAVE ABSORPTION PROPERTIES OF ABSORBING PATCH BASED ON POLYURETHANE

Abstract

Abstract: In this work, an PU absorbing patch, filled with MZ and carbon black as the absorbent, was prepared by rotational moulding process. The influence of absorbing agent on the electromagnetic and absorbing property of the absorbing patch was analyzed. Furthermore, the microwave absorbing mechanism of the absorbing patch was discussed. Finally, the results show that the increase of absorbing agent content will cause the improvement of attenuation characteristic, and simultaneously, will cut down the impedance matching between absorbing patch and free space. The destructive interference result in the position of absorption peak tends to low frequency direction, with the increase of the absorbing agent content or thickness of the absorbing patch. An PU absorbing patch, with 1.5 mm thickness and filled with 80wt% MZ as the absorbent, has the best absorbing property, whose reflectivity is less than -10 dB between 9.18 GHz and 17.37 GHz, and could basically meet the requirement of warship keeping radar stealth in the X and Ku band.

Key words: absorbing patch, attenuation characteristic, impedance matching, interference, radar stealth

CLC Number:

TB332

HE Xiang, LI Yong-qing, ZHU Xi, LI Mao. PREPARATION AND MICROWAVE ABSORPTION PROPERTIES OF ABSORBING PATCH BASED ON POLYURETHANE[J]. Fiber Reinforced Plastics/Composites, 2017, 0(12): 34-40.

References

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