A new compact microstrip two-layer bandpass filter using aperture-coupled SIR-hairpin resonators with transmission zeros
A new compact microstrip two-layer bandpass filter using aperture-coupled SIR-hairpin resonators with transmission zeros
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DOI：
10.1109/tmtt.2006.872797
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发表时间：
2006-05-01
影响因子：
4.3
通讯作者：
Denidni, Tayeb A.
中科院分区：
文献类型：
--
作者：
Djaiz, Azzeddine;Denidni, Tayeb A.
本文提出并研究了一种利用孔耦合微带阶跃阻抗发夹谐振器设计的两层紧凑带通滤波器。该滤波器由位于两个堆叠微带层上的四个阶跃阻抗发夹谐振器组成，并通过在两层之间的公共接地面上蚀刻三个耦合孔来实现上下两层谐振器之间的耦合。此外，抽头输入/输出耦合的使用允许该带通滤波器产生两个独立的传输零点。利用全波模拟器对结构进行了设计，并计算了孔径耦合系数。采用这种两层结构，所提出的滤波器变得非常紧凑，占用很小的空间。为了验证所提出的设计，设计、制作了一个四阶带通滤波器原型，并在2.14 GHz下进行了测试。在此基础上，设计并制作了同一频段的单层滤波器原型，并与单层滤波器进行了对比。结果，实现了大约50%的显著减少。这些特点使所提出的结构适用于微波电路中紧凑和高性能的电路元件设计。
A new design of a compact two-layer bandpass filter using aperture-coupled microstrip stepped-impedance hairpin resonators is proposed and investigated in this paper. The proposed filter is composed of four stpped-impedance hairpin resonators located on two stacked microstrip layers, and the couplings between the resonators on the upper layer and those on the lower one are obtained by using three coupling apertures etched on a common ground plane placed-between the two layers. In addition, the use of tapped input/output couplings allow this bandpass filter to generate two independent transmission zeros. A full-wave simulator is used to design the proposed structure and calculate the aperture coupling coefficients. With this two-layer configuration, the proposed filter becomes very compact and occupies a small space. To demonstrate the proposed design, a four-order bandpass-filter prototype was designed, fabricated, and tested at 2.14 GHz. Furthermore, a single-layer filter prototype was also designed and fabricated at the same frequency band and then compared to the first one. As a result, a significant reduction of approximately 50% was achieved. These features make the proposed structure suitable for compact and high-performance circuit component designs in microwave circuits.