| The rapid development of modern military detection and guidance technology has brought serious threat to the military targets of the future battlefield."Discovery means destruction" has become the consensus of modern war experts.The technology of improving the viability of the weapon system and the ability of penetration has been paid more and more attention by all countries.Although traditional rader absorbing materials have the characteristics of simple technology and easy to adjust,they have gradually been unable to keep up with the development of detection.Therefore,people focus on the fields of structural absorption,artificial electromagnetic materials and so on.As a kind of absorbing material with light weight,low thermal conductivity and excellent mechanical and magnetic properties,the honeycomb absorption structure has attracted more and more attention from designers.However,because of its complex structure,the acquisition of its electromagnetic parameters has become a bottleneck restricting its development.In this paper,a variety of absorbents,adhesives,aramid paper ring and wave absorbing honeycomb materials are prepared by experimental method,and their electromagnetic parameters are obtained by coaxial,waveguide and free space methods.Through analysis of the data,the absorption of absorbents is determined to increase the effect of absorption.The cellular electromagnetic parameters are obtained by using the cellular cell model in the simulation software,and the results are in good agreement with the test data of the absorbents at different heights and absorbents.For the heteromorphic honeycomb with different aperture ratio,the results show that the method is also suitable.In the 2-18GHz band,the bandwidth of the 15mm thick honeycomb is less than-10dB when the weight gain is 41.25%and the aperture ratio is 0.68,and the peak value of 4GHz and 12GHz reaches-30dB and-22dB,which provides reference for the design of honeycomb materials.It has certain engineering practical value. |
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