摘要
研究了Sn改性（Pb0．45Ca0．55）{（Fe0．5Nb0．5）O3微波介质陶瓷的微波介电性能，在此基础上以切比雪夫响应法设计制备出四腔独石型介质滤波器，并分析影响滤波器性能的因素。结果表明，添加Sn可改善（（Pb0．45Ca0．55）{（Fe0．5Nb0．5）O3陶瓷的介电性能，且能在1150℃烧结出致密的陶瓷材料；当x（Sn）=0．1（摩尔分数）时，其介电常数εr=84．7，频率温度系数τf=0．5，品质因数与频率之积Q×f=8452GHz。成功设计制备出中心频率1．075GHz、插入损耗2．3dB、驻波比为1．1的介质滤波器，该器件满足9001200MHz范围的通讯应用要求。
The microwave dielectric properties of （Pb0.45Ca0.55）{（Fe0.5Nb0.5）1-xSnx）O3 microwave ceramics and design of 4 hole monoblock band pass filter using Chebysher resonance method were investigated to prepare dielectric filter, and the influential factors on filter properties were analyzed. The Sn additives for substituting （Fe0.5 Nb0.5 ） significantly increased the dielectric properties of （Pb0.45 Cao. 55 ） （Fe0. 5 Nb0.5 ） O3 and its sinterability. When x = 0. 1 （mole fraction）, the compacted ceramics were sintered at 1 150℃, and its dielectric properties were following：εr = 84. 7, τf =0.5, Q×f= 8 452 GHz. The dielectric filters using （Pb0.45Ca0.55）{（Fe0.5Nb0.5）1-xSnx）O3 ceramics have a center frequency of 1. 075 GHz, insertion loss of 2.3 dB, voltage standing wave ratio of 1.1, which reached the design targets and is suitable for communication applications at 900～1 200 MHz.
出处
《压电与声光》
CSCD
北大核心
2007年第1期26-28,32,共4页
Piezoelectrics & Acoustooptics
