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首页> 外文会议>2014 Joint IEEE International Symposium on the Applications of Ferroelectrics, International Workshop on Acoustic Transduction Materials and Devices amp; Workshop on Piezoresponse Force Microscopy >Embedded band pass filter designed using embedded capacitor material
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Embedded band pass filter designed using embedded capacitor material

机译：使用嵌入式电容器材料设计的嵌入式带通滤波器

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摘要

A new compact microstrip dual-mode bandpass filter with the center frequency of 2.4GHz is proposed based on embedded capacitance material (BaTiO3-epoxy composite film). The filter consists of a defect ground structure (DGS) and an open-loop step-impedance resonator with a short-circuit line in the middle of the resonator. The bandwidth of the filter can be optimized by adjusting the width of the short-circuit line. A compact prototype was fabricated by embedding the bandpass filter into a multi-layered FR-4 packaging substrate through the PCB manufacturing process. The measured results show that the insertion loss is 2.23 dB, the return loss is greater than 30dB at the center frequency 2.231 GHz. The size of the proposed single one is 1.8 mm×1.85 mm. To improve the performance of the filter, a cascaded two-stage dual-mode filter with open-loop DGS was designed, fabricated and measured based on the single dual-mode filter. The size of the prototype is 3.55 mm×1.75 mm. The measured insertion loss is less than 4 dB and the return loss is higher than 15dB at 2.58 GHz, both agreeing well with the simulated results below 5GHz. It indicates that introducing the DGS can improve the pass band characteristic, miniaturization and selectivity.
机译：提出了一种基于嵌入式电容材料（BaTiO3-环氧复合膜）的新型紧凑型微带双模带通滤波器，其中心频率为2.4GHz。该滤波器由一个缺陷接地结构（DGS）和一个开环步进阻抗谐振器组成，谐振器中间有一条短路线。可以通过调整短路线的宽度来优化滤波器的带宽。通过在PCB制造过程中将带通滤波器嵌入多层FR-4封装基板中，可以制造出紧凑的原型。测量结果表明，在中心频率为2.231 GHz时，插入损耗为2.23 dB，回波损耗大于30dB。所提出的单个的尺寸为1.8mm×1.85mm。为了提高滤波器的性能，基于单双模滤波器设计，制造和测量了具有开环DGS的级联两级双模滤波器。原型的尺寸为3.55毫米×1.75毫米。在2.58 GHz时测得的插入损耗小于4 dB，回波损耗高于15dB，两者都与5 GHz以下的仿真结果非常吻合。这表明引入DGS可以改善通带特性，小型化和选择性。

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