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Realization of Thin and Broadband Magnetic Radar Absorption Materials With the Help of Resistor FSS

By: Xu, H.; Wan, D.; Bie, S.; Zhou, J.; Jiang, J.; Xu, Y.;

2015 / IEEE


This item from - IEEE Letter - Fields, Waves and Electromagnetics - In this letter, a kind of composite radar absorption material consisting of gradient and spiral square resistor frequency selective surface (FSS) and magnetic sheets is designed by HFSS. The use of resistor FSS makes a significant increase of operating bandwidth compared to single magnetic radar absorption materials (mRAMs). Under the condition of normal incident electromagnetic wave, it has remarkable absorptive performance with the reflectivity below - 10 dB with a thin thickness of 2 mm in the range of 6–18 GHz. In addition, the composite mRAMs exhibits high angular stability when the incident angle ranges from 0^° to 30^° . In order to illustrate the importance of resistors, a comparative experiment of structure with nonresistor FSS is made. Experimental results are compared to numerical simulations. They are in agreement with each other.