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Synthesis design of wideband bandpass filter with narrow notch band
Microwave and Optical Technology Letters ( IF 1.5 ) Pub Date : 2020-12-21 , DOI: 10.1002/mop.32762
Yong‐Qiang Chai 1, 2 , Chong‐Hu Cheng 1 , Jin‐Rong Mo 2 , Yan‐Feng Shi 2 , Sheng‐Bo Hu 2
Affiliation  

In this article, a novel wideband bandpass filter (BPF) with narrow notch band is presented. It is composed of two sets of shunt microstrip‐to‐slotline vertical transitions, a coplanar waveguide (CPW) connecting line, and a meandering half‐wavelength slotline section. Utilizing the synthesis method based on the transmission line network, a four‐pole BPF with Chebyshev equal‐ripple frequency response is realized in the desired passband. The narrow notch band with 3‐dB fractional bandwidth (FBW) of 3% at the center frequency 2.75 GHz is introduced by an embedding meandering slotline stub. To verify the theoretical prediction, the proposed BPF is fabricated and measured. The circuit model and EM simulation are consistent with theoretical calculation and test results, which sufficiently confirm the correctness and feasibility of the design method.

中文翻译:

窄带隙宽带带通滤波器的综合设计

在本文中,提出了一种具有窄陷波带宽的新型宽带带通滤波器(BPF)。它由两组分流微带线到缝线的垂直过渡,一条共面波导(CPW)连接线和一条蜿蜒的半波长缝线部分组成。利用基于传输线网络的综合方法,在期望的通带中实现了具有切比雪夫等波纹频率响应的四极BPF。嵌入曲折缝线短截线引入了在中心频率2.75 GHz处具有3%的3-dB分数带宽(FBW)为3%的窄陷波带。为了验证理论预测,制造并测量了所提出的BPF。电路模型和电磁仿真与理论计算和测试结果相吻合,充分证实了设计方法的正确性和可行性。
更新日期:2020-12-21
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