本文通过交流磁滞回线研究了Co基玻璃包覆丝去除玻璃层前后的磁性能变化；制备了含有Co基玻璃包覆非晶丝的膜状噪声抑制材料,采用微带线测试系统测试了复合膜的S参数,并计算出功率损耗比,由此研究了丝材玻璃层对复合膜微波噪声抑制特性的影响.实验结果显示:在5kHz频率下,制备态玻璃包覆非晶丝的矫顽力大于去除玻璃层后丝材的矫顽力.去除玻璃层使复合膜在低频的反射增大,而在高频的反射总体上有所减小.同时还使复合膜样品在低频范围内的吸收增强,样品的吸收峰变宽.丝材去除玻璃层后,复合膜样品的禁带带宽明显增大,噪声抑制特性得到提高.含有去除玻璃层后丝材的复合膜样品在1.8 GHz至8.5 GHz频率范围内功率损耗比在80％以上,具有优异的微波噪声抑制特性.
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