【作者】 熊艳霞； 程崇虎； 曹志；

【Author】 Xiong Yan Xia Cheng Chong Hu Cao Zhi (College of Electronic Science & Engineering,Nanjing University of Posts and Telecommunications,Jiangsu Nanjing 210003,China)

【机构】 南京邮电大学电子科学与工程学院；

【摘要】 提出了一种紧凑的基于LTCC技术的集总带通滤波器结构。加入耦合板控制带宽。调节在输入输出端引入反馈电容改善阻带性能。利用等效集总电路,采用图解和数学方法解释传输零点变化,同时给出了设计此类滤波器的一般步骤。设计的滤波器采用ε_r=2.2的陶瓷介质材料,尺寸为4mm×4mm×1.2mm,中心频率f₀=1.95GHz,通带内插入损耗小于1.5 dB,回波损耗大于20dB。更多还原

【Abstract】 The paper proposes a new compact low temperature co-fired ceramic(LTCC) filter configuration which control the bandwidth of previous designs by adding coupling pad.a feedback capacitor between input and output improves the stopband attenuation performance.An equivalent lumped circuit is derived to explain the behaviors both graphically and mathematically of the two finite transmission zeros,a simple design procedure for such a compact filter is also given.Usingε_r=2.2 ceramic dielectric material,This filter operates at 1.95GHz and has a compact size of 4mm×4mm×1.2mm.the filter insert losses were less than 1.5 dB and return loss more than 20dB in the passband.更多还原