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Novel lowpass filter with ultra-wide stopband using defected ground structure

机译:具有缺陷地结构的具有超宽阻带的新型低通滤波器

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In this paper, a novel lowpass filter using defected ground structure (DGS) with a stopband up to 40GHz is realized using Rogers RT5880 substrate ( thickness = 0.508 mm). The filter is combined with two parts, the top single microstrip and the bottom DGS. The simulated and measured results show the great stopband performance of this filter. The passband of this lowpass filter is from 10 MHz to 4.85 GHz, with the typical insertion loss of 0.6 dB and the minimum return loss of 30 dB, while the stopband starts from 5.2 GHz to 40 GHz and all S21 is below −23dB. Compared to other lowpass filter, this filter has an ultra-wide stopband in the same size (80mm * 10mm) and is realized only by DGS rather than modifying the top microstrip.
机译:在本文中,使用Rogers RT5880基板(厚度= 0.508毫米)实现了一种新型的低通滤波器,该滤波器使用了具有高达40GHz阻带的缺陷接地结构(DGS)。滤波器由两部分组成,顶部是单个微带,底部是DGS。仿真和测量结果表明该滤波器具有出色的阻带性能。该低通滤波器的通带范围为10 MHz至4.85 GHz,典型的插入损耗为0.6 dB,最小回波损耗为30 dB,而阻带的范围为5.2 GHz至40 GHz,所有S21均低于−23dB。与其他低通滤波器相比,该滤波器具有相同尺寸(80mm * 10mm)的超宽阻带,并且仅通过DGS即可实现,而无需修改顶部微带。

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