【作者】 张朝发； 李焕喜； 吕明云；

【Author】 ZHANG Chao-fa~1 LI Huan-xi~1 LU Ming-yun~2 (1.School of Material Science and Engineering,Beijing University of Aeronautics & Astronautics,Beijing 100191,China;2.School of Aeronautic Science and Technology,Beijing University of Aeronautics & Astronautics,Beijing 100191,China)

【机构】 北京航空航天大学材料科学与工程学院； 北京航空航天大学航空科学与工程学院；

【摘要】 利用实验方法研究了圆环、六边形环和"Y"环频率选择表面(frequency selective surfaces,FSS)复合材料的微波吸收特性。研究结果表明,含FSS吸波材料的吸波性能与振子尺寸和排列周期密切相关。圆环半径和周期的减小,材料的吸波性能提高,圆环的半径和周期分别为3.5和13mm时,材料可获得6GHz的带宽和-16dB的反射率。减小六边形环的边长和排列周期,可以增加材料的带宽,而对材料的反射率有不利影响,六边形的边长为4mm时,材料的带宽为7GHz;周期为15mm时,材料获得最佳的反射率——27dB。随"Y"环臂长和周期的减小,材料的带宽增加,反射率峰值降低,材料的综合吸波性能得到提高,当臂长和半径为3和12mm时,材料的吸波性能最好,带宽为6GHz,反射率为-25dB。更多还原

【Abstract】 Microwave absorbing properties of composites containing frequency selective surfaces (FSS) with peri- odic circle-loop,hexagon-loop and"Y"-loop cell unit were investigated by experimental method respectively. Results show that the absorbing performances of composites are affected greatly by the lattice and arrangement period of the cells.With the radius and arrangement period of circle-loop decreased,the microwave absorbing properties of composites are improved.In the research,the band width (frequency range of reflection loss below -10dB) of 6GHz and the minimum reflectivity of-16dB of composite are obtained when the radius is 3.5mm and arrangement period is 13mm.With the side length and arrangement period of hexagon-loop decreased,the band width and the reflectivity of composite increase.The band width is 7GHz when the side length is 4mm and the minimum reflectivity is-27dB when the arrangement period is 15mm.With the side length and the ar- rangement period of"Y"-loop reduced,the band width of composite increases and the minimum reflectivity of composite falls which means the absorbing property of composite is improved.The band width of 6GHz and the minimum reflectivity of-25dB of composite are obtained when the side length and the arrangement period are 3mm and 12mm respectively.更多还原