Ching‐Wen Tang, Chien-Chung Tseng, Huei-Hung Liang, Sheng-Fu You
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引用次数: 12
摘要
提出了利用低温共烧陶瓷(LTCC)技术实现超宽带滤波器的新方法。该超宽带LTCC滤波器采用带电感反馈的四腔带通滤波器实现。根据上述方法，可以在超宽带滤波器的通带裙边两侧产生一对传输零。该滤波器还可以提高无线通信系统的灵敏度和线性度。多层结构的优点可以缩小电路的尺寸。设计的原型滤波器，中心频率选择在4 GHz左右，通频带频率在2.96 ~ 4.91 GHz之间。带宽比为48.75%。制备的陶瓷片介电常数为7.8，滤波器尺寸为119 mil /spl倍/ 79 mil /spl倍/ 33.72 mil。
A novel method to realize the ultra-wideband filter with the low temperature co-fired ceramic (LTCC) technology has been proposed. This ultra-wideband LTCC filter was implemented using a four-resonator bandpass filter accompany with inductance feedback. According to the above mentioned method, a couple of transmission zeros can be generated at two-side of passband's skirt of the ultra-wideband filter. This filter also can increase the sensitivity and linearity of the wireless communication system. The advantage of multi-layered structure may shrink the circuit size. The designed prototype filters, center frequencies around 4 GHz were selected and passband frequency is between 2.96-4.91 GHz. The bandwidth ratio is 48.75%. The fabricated ceramic sheet with dielectric constant of 7.8, and the size of filter is 119 mil /spl times/ 79 mil /spl times/ 33.72 mil.
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