【作者】 苏桦；

【导师】 张怀武；

【作者基本信息】 电子科技大学 ， 材料物理与化学， 2002， 硕士

【摘要】 随着IT行业向高频化方向发展，伴随产生大量高频的电磁干扰，解决的唯一途径是引入无源EMI滤波器，这就对抗EMI材料和器件提出了更高的要求。本文遵循从材料到器件的设计研制思路，首先对高频段性能较佳的NiZn铁氧体进行了大量掺CuO实验，然后从理论和实践上对NiCuZn系列配方和工艺进行优化设计，并将遗传算法引入到配方优化中。最后，采用研制的NiCuZn系列材料，设计制作了复合LC滤波器及宽带吸收式滤波器，并对制作的滤波器进行了理论设计和实际动态分析。实际的测试表明该滤波器对高频噪声信号有很好的抑制作用，具有很实际的应用价值。更多还原

【Abstract】 With the development of information technology, electronic systems bring more and more high frequency electromagnetic interferes. To solve these problems, the only approach is to bring into EMI filters. So we must develop more efficacious anti-EMI materials and components. To go by the path from materials to components, firstly, we do many experiments to test the influences of CuO bringing to NiZn ferrites, and then we analyze the electromagnetic performances of NiCuZn ferrites and get a serial of prescriptions of NiCuZn ferrites with permeability from low to high. We also use genetic algorithms to optimize prescriptions of NiCuZn ferrites. Finally, we produce LC-compound filter and absorbing mode filter using frontal NiCuZn ferrite. Test shows that the filters are effectual to restrain high-frequency EMI signals.更多还原