.pzt / Ferrite Composites Of Nicuzn Ltcc Filter Development,

With the rapid development of wireless communication,it becomes more and more important for the electronic components to the direction of small size, multi-functional and chip-functional. The electromagnetic interference (EMI) is becoming an increasingly serious problem. Thus function composite materials component which having a variety of functions has a pivotal role to solve the integration. At the present, LTCC (Low Temperature Co-fired Ceramic) technology has become a high-quality and effective technology for passive integration to make chip component.In this dissertation, the low-temperature sintering of PZT/NiCuZn ceramic-ferrite composite materials have been analyzed as the object of study. The anti-EMI filter is designed based on LTCC by using of the composite materials.The main results are as follows:1. P2O5 doped low temperature sintered PZT/NiCuZn composite materials were also investigated in the aspects of the microstructure and magnetic properties. On the basis of Bi2O3 doping in a fixed amount, the effects of P2O5-Co2O3 co-additive on the microstructure and electromagnetic properties of low temperature sintering composite materials were investigated. The optimal doping distribution is summed according to the above experiments.Different methods of Bi2O3 doped low temperature co-fired double-composite material performance was contrasted and discussed. The effects of microstructure and electromagnetic properties also were investigated by different style of Bi2O3 doping.2. The prepared PZT/NiCuZn composite materials were chosen to design the anti-EMI low pass filter by using of LTCC technique. The ADS and HFSS software simulated circuit diagram and three dimensional structure to design the two kinds of low pass filters: One was set up with cut off frequency is 100MHz, attenuation exceed 15dB at 200MHz, another one was set up with cut off frequency is 30MHz, attenuation exceed 20dB at 100MHz.3. According to simulating results, LTCC technology was adopted to fabricate the samples. And the testing results by Agilent Network Analyzer mostly agree with the simulated data.A little differences were discussed in details.And the main reason was caused by the deviation of LTCC process. It was proved that the composite materials used for microwave devices were reasonable and effective.