Ultra-Wideband Bandpass Filter With a Notch-Band Using Stub-Loaded Ring Resonator
Ultra-Wideband Bandpass Filter With a Notch-Band Using Stub-Loaded Ring Resonator
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使用短截线负载环形谐振器的带陷波超宽带带通滤波器
DOI：
10.1109/lmwc.2013.2262928
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发表时间：
2013-07-01
影响因子：
3
通讯作者：
Chu, Qing-Xin
中科院分区：
文献类型：
--
作者：
Zhu, He;Chu, Qing-Xin
本文提出了一种四模超宽带带通滤波器，它具有陷波带和宽上阻带。UWB滤波器使用加载有两组短截线的环形谐振器来实现，即，一个在中心加载，两个小短截线在对称的侧部位置。利用加载短截线在上阻带产生传输零点，从而大大抑制了高次模。此外，两个相同的通孔加载的环形谐振器被插入到通孔加载的环形谐振器内，以创建大约5-6 GHz的陷波带，以避免WLAN信号。在陷波带内出现两个反射极点，导致陷波带带宽可切换。最后，一个UWB滤波器与陷波带的模拟和制作，和测量结果提供了一个实验验证的预测性能的滤波器。
A quadruple-mode ultra-wideband (UWB) bandpass filter with a notch-band and wide upper stopband is presented in this letter. The UWB filter is realized using a ring resonator which is loaded with two sets of stubs, i.e., one is loaded in the center and two little stubs at the symmetrical side locations. The loaded stubs are used to create transmission zeros in upper stopband thus high modes are suppressed greatly. Moreover, two identical via-loaded ring resonators are inserted within the stub-loaded ring resonator, to create a notch-band around 5-6 GHz to avoid WLAN signals. Two reflection poles appear in the notch-band, resulting in a switchable bandwidth of the notch-band. Finally, a UWB filter with a notch-band is simulated and fabricated, and measured results provide an experimental validation of predicted performance of the filter.