【摘要】 粉末材料的微波耗散机理不同于块状材料,非磁性的金属与氧化物混合粉末展现出对微波磁场较强的吸收特性。本文针对金属与氧化物混合粉末的电导率和微波磁吸收特性开展研究,并利用特定比例的混合粉末加载基于静磁表面波的隔离滤波器,研究其对非互易滤波器的隔离度和插入损耗的影响。实验结果表明:30%Cu+70%CuO的混合粉末电导率为217.435mS/m,对微波磁场具有较好的吸收特性;利用此混合粉末加载非互易滤波器后,插入损耗减小,隔离度获得了明显提升,达到了21.56 dB。更多还原

【Abstract】 The microwave dissipation mechanism of powder materials is different from that of bulk materials. The mixed powder of non-magnetic metal and oxide show strong absorption on microwave magnetic field. Researches which focus on the electrical conductivity and microwave magnetic absorption characteristics of the mixed powders are carried out. Samples of the mixed powders are loaded to the isolating bandpass filter which is achieved with magnetostatic surface wave, in order to study their effects on the isolation and insertion loss of non-reciprocal filter. The experimental results show that: the 30%Cu+70%CuO mixed powder sample with conductivity of 217.435 mS/m has strong absorption on the microwave magnetic field; after loading this mixed powder sample to the non-reciprocal filter, the insertion loss is reduced and the isolation is significantly increased to 21.56 dB.更多还原