Design of a Compact Ultra-Wideband Bandpass Filter With an Extremely Broad Stopband Region
Design of a Compact Ultra-Wideband Bandpass Filter With an Extremely Broad Stopband Region
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DOI：
10.1109/lmwc.2016.2558039
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发表时间：
2016-05
影响因子：
3
通讯作者：
Siang‐Wen Lan;M. Weng;C. Hung;S. Chang
中科院分区：
文献类型：
--
作者：
Siang‐Wen Lan;M. Weng;C. Hung;S. Chang
本文提出了一种紧凑型超宽带（UWB）带通滤波器（BPF）的设计方案，该滤波器在3.1 ~ 9.9 GHz范围内具有0.8 dB的低插入损耗（IL），在10.9 ~ 25.1 GHz范围内具有20 dB的高抑制水平，具有极宽的阻带范围。该超宽带带通滤波器结构简单，只使用一个单级并联耦合线和两个矩形短截线谐振器。在该设计中，矩形短截线谐振器提供激励模式以增强期望的UWB响应，并且还通过适当地控制阻抗比（R）来创建可调谐传输零点以扩展宽阻带。滤波器的制造和测量，以验证设计概念。
This letter presents a design of a compact ultra-wideband (UWB) bandpass filter (BPF), which can exhibit an UWB response from 3.1 to 9.9 GHz with low insertion loss (IL) of 0.8 dB and an extremely broad stopband region from 10.9 to 25.1 GHz with high rejection level of 20 dB. This UWB BPF is simply constructed by using only one single-stage parallel-coupled line and two rectangular stub resonators. In this design, the rectangular stub resonators provide an exciting mode to enhance the desired UWB response and also create tunable transmission zeros to extend a wide stopband by controlling the impedance ratio (R) properly. The filter was fabricated and measured to verify the design concept.