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首页> 外文期刊>International Journal of Microwave and Wireless Technologies >Highly compact UWB bandpass filter based on composite right/left-handed transmission line and meander fractal like ring slot in ground
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Highly compact UWB bandpass filter based on composite right/left-handed transmission line and meander fractal like ring slot in ground

机译：基于右/左手复合传输线和地面中环形槽的曲折分形的高度紧凑的UWB带通滤波器

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摘要

An ultra-wideband (UWB) highly compact bandpass filter with extremely high passband bandwidth is presented. The proposed structure is made using three-staged stepped-impedance lines and a composite right/left-handed transmission line (CRLH-TL) synthesized with meander fractal like ring slot in the ground and series capacitive gap in conductor strip. The capacitive gap in conductor strip and meander fractal like ring slot in the ground plane play major role for controlling the lower and higher cut-off frequencies. The equivalent circuit model of proposed filter is demonstrated and lumped parameters are extracted. A prototype is fabricated to experimentally validate the performance of proposed filter. The proposed UWB filter has extremely wide -10 dB return loss passband bandwidth from 3.14 to 18.26 GHz with relative bandwidth of 142% and insertion loss better than 0.5 dB. Also it achieves a wide upper-stopband from 19.7 to 24.4 GHz with insertion loss better than 13.0 dB, return loss < 1.5 dB and sharpened rejection skirts outside the passband at both lower and upper frequency ends. Good agreement is found between simulated and measured results with measured group delay variation in the passband < 0.65 ns.
机译：提出了一种具有极高通带带宽的超宽带（UWB）高度紧凑的带通滤波器。所提出的结构是使用三段式步进阻抗线和复合的左右手传输线（CRLH-TL）合成的，该复合线的曲折分形像接地环槽，导体带中串联了电容间隙。导体带中的电容性间隙和接地平面中的曲折形分形（如环形槽）在控制较低和较高的截止频率方面起着重要作用。演示了所提出滤波器的等效电路模型，并提取了集总参数。制造了一个原型，以通过实验验证所提出的滤波器的性能。拟议中的UWB滤波器在3.14至18.26 GHz范围内具有-10 dB的极高回波损耗通带带宽，相对带宽为142％，插入损耗优于0.5 dB。它还实现了从19.7 GHz到24.4 GHz的较宽的上阻带，插入损耗优于13.0 dB，回波损耗<1.5 dB，并且在低频端和高频端通带外的抑制裙都更加尖锐。在仿真结果与测量结果之间发现了很好的一致性，并且通带中测得的群延迟变化<0.65 ns。

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