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首页> 外文期刊>International Journal of Microwave and Wireless Technologies >Design of a compact multi-mode UWB band pass filter with flexible notch band employing interdigital coupled lines
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Design of a compact multi-mode UWB band pass filter with flexible notch band employing interdigital coupled lines

机译：采用叉指耦合线路的具有柔性陷波带的紧凑型多模UWB带通滤波器的设计

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摘要

A novel ultra-wideband Microstrip bandpass filter using Radial Stub Loaded Resonator (RSLR) and interdigital coupled Lines is presented in this paper. The RSLR and decagonal patch form a resonator named M to create tuneable multiple notches in the passband for the suppression of Wireless Local Area Network systems' interference. To realize sharp roll-off, two adjustable transmission nulls are located at the lower and upper frequencies out of the passband. Even and odd-mode analysis is presented to calculate modal resonance frequencies contributing to create the ultra-wide passband. Bessel function is employed to estimate the input impedance of the radial stub which is used in formulation of even and odd mode admittances. Simulated and measured results show a passband from 3.4 to 12 GHz (135% bandwidth around 6.39 GHz) with a rejection notch at 4.99 GHz is achieved with return losses better than 14 and 12 dB in the first and second passbands, respectively. The insertion loss is lower than 0.9 dB in the 90% of passband and rejection level is greater than 19 dB from 12.25 to 17.45 GHz.
机译：本文提出了一种新的利用径向短管谐振器（RSLR）和叉指耦合线的超宽带微带带通滤波器。 RSLR和十边形补丁形成一个名为M的谐振器，以在通带中创建可调谐的多个陷波，以抑制无线局域网系统的干扰。为了实现快速滚降，两个可调的传输零点位于通带之外的较低和较高频率处。偶数和奇数模式分析用于计算模态谐振频率，有助于创建超宽通带。贝塞尔函数用于估计径向短截线的输入阻抗，该公式用于偶数和奇数模导纳的公式化。仿真和测量结果显示，在3.4和12 GHz的通带（6.39 GHz处有135％的带宽），在4.99 GHz处具有抑制陷波，在第一和第二通带中的回波损耗分别优于14和12 dB。在12.25 GHz至17.45 GHz范围内，通带的90％的插入损耗低于0.9 dB，而拒绝电平则高于19 dB。

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