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首页> 外文期刊>International Journal of Microwave and Wireless Technologies >Microstrip lowpass filter with wide stopband and sharp roll-off using modified radial stub resonator
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Microstrip lowpass filter with wide stopband and sharp roll-off using modified radial stub resonator

机译：微带低通滤波器，带宽阻带和陡峭滚降，采用改进的径向短截线谐振器

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摘要

In this paper, a microstrip lowpass filter with wide stopband and sharp roll-off is presented. The proposed filter consists of a modified radial stub resonator which is cascaded by four suppressing cells. To reduce the overall size, the transmission lines are folded. The cut-off frequency of the proposed filter is 1.19 GHz. The transition band is approximately 0.2 GHz from 1.19 to 1.39 GHz with corresponding attenuation levels of 3-20 dB. The stopband is from 1.39 to 19 GHz with attenuation level of < 20 dB. The insertion loss and return loss in the passband from DC to 0.8 GHz are better than 0.26 and 14 dB, respectively. The proposed filter is fabricated and measured. The simulated and measured results are in good agreement.
机译：本文提出了一种具有宽阻带和急剧滚降的微带低通滤波器。所提出的滤波器由一个改进的径向短线谐振器组成，该谐振器由四个抑制单元级联。为了减小整体尺寸，传输线被折叠。建议滤波器的截止频率为1.19 GHz。从1.19到1.39 GHz的过渡带约为0.2 GHz，相应的衰减水平为3-20 dB。阻带范围为1.39至19 GHz，衰减水平<20 dB。从DC到0.8 GHz的通带中的插入损耗和回波损耗分别优于0.26和14 dB。所提出的滤波器被制造和测量。仿真和测量结果吻合良好。

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