A Compact UWB Bandpass Filter With Embedded SIR as Band Notch Structure
A Compact UWB Bandpass Filter With Embedded SIR as Band Notch Structure
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DOI：
10.1109/lmwc.2011.2128302
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发表时间：
2011-04
影响因子：
3
通讯作者：
R. Ghatak;P. Sarkar;R. K. Mishra;D. R. Poddar
中科院分区：
文献类型：
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作者：
R. Ghatak;P. Sarkar;R. K. Mishra;D. R. Poddar
本文提出了一种带陷波超宽带(UWB)带通滤波器。超宽带带通滤波器(3.1-10.6 GHz)由一个分布式高通滤波器和一个嵌入阶跃阻抗谐振器(SIR)的椭圆低通滤波器级联而成，实现了带阻抗特性。在5.22 GHz处获得了陷波带。结果表明，可以通过改变嵌入SIR的阻抗比来调谐陷波频率。研制了一种制作的超宽带带通滤光片样机。通过测量、EM仿真和等效电路模型得到的带内带外性能与实验结果吻合较好。
In this letter, an ultrawideband (UWB) bandpass filter with a band notch is proposed. The UWB BPF (3.1-10.6 GHz) is realized by cascading a distributed high-pass filter and an elliptic low-pass filter with an embedded stepped impedance resonator (SIR) to achieve a band notch characteristic. The notch band is obtained at 5.22 GHz. It is shown that the notch frequency can be tuned by changing the impedance ratio of the embedded SIR. A fabricated prototype of the proposed UWB bandpass filter is developed. The inband and out-of-band performance obtained by measurement, EM simulation, and that with an equivalent circuit model are in good agreement.