Characterization of Novel Magnetically Loaded Flocked Carbon Fiber Microwave Absorber
Characterization of Novel Magnetically Loaded Flocked Carbon Fiber Microwave Absorber
复制标题
新型磁力负载植绒碳纤维微波吸波器的表征
DOI：
10.1109/emcsi.2018.8495186
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
K. G. Thompson
中科院分区：
文献类型：
--
作者：
H. Tran;T. Le;B. Pejcinovic;Jeffrey T Brown;R. Doneker;K. G. Thompson
报道了一种利用毫米长碳纤维(CF)研制的新型微波吸收材料。使用植绒工艺静电沉积碳纤维。然后将微米大小的铁氧体珠子沉积在碳纤维的尖端。这种材料很轻，密度约为0.32g/英寸，厚度从一毫米到几毫米不等。它的吸收是宽带的，并且相对于频率响应和吸收的量是可调的。在暗室中用NRL拱形测量方法对吸波材料进行了X波段的表征。该材料表现出宽带衰减，从X波段边缘的约−10db到11.1GHz的峰值−46db。利用波导法测量了吸波材料的复介电常数和磁导率。利用提取的参数进行了电磁仿真，并与实测值进行了比较，结果吻合较好。通过与一种已知的商业吸收材料的比较，成功地验证了整个提取过程。吸振器的性能可与现有解决方案相媲美。
The development of a novel microwave absorber material utilizing mm-length carbon fibers (CF) is reported. The CF are deposited electrostatically using the flocking process. Micron-sized ferrite beads are then deposited on tips of carbon fibers. The material is lightweight with density of ~0.32 g/in2and its thickness can vary from one to several millimeters. Its absorption is broadband and tunable with respect to frequency response and amount of absorption. The absorber was characterized in X-band using NRL arch measurement in an anechoic chamber. The material exhibited broadband attenuation ranging from around −10 dB at the edges of X-band to a peak of −46 dB at 11.1 GHz. Absorber complex permittivity and permeability were extracted using waveguide measurements. Electromagnetic simulations utilizing extracted parameters were compared with measured data and good agreement was found. Overall extraction process was successfully verified by comparison with a known commercial absorber material. The absorber performance compares favorably with existing solutions.