A tunable wideband microstrip bandstop filter based on liquid crystal materials
A tunable wideband microstrip bandstop filter based on liquid crystal materials
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DOI：
10.1109/iccps.2014.7062370
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发表时间：
2014-03
期刊：
影响因子：
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通讯作者：
Longzhu Cai;Huang Xu;M. Pivnenko;D. Chu
中科院分区：
文献类型：
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作者：
Longzhu Cai;Huang Xu;M. Pivnenko;D. Chu
提出了一种基于液晶的小型可调谐宽带微带带阻滤波器。为了实现结构紧凑和宽阻带带宽，设计了一种双短截线弯曲结构。可以通过施加0-20 V之间的电压来调节LC介电常数来调谐BSF阻带。第一阻带和第二阻带的可调谐度均大于7%，3dB带宽分别大于3GHz和2.5GHz。抑制水平高于41 dB。这种基于LC的BSF器件具有高可调谐性、宽阻带带宽、低驱动电压和紧凑尺寸，在广泛的应用中是有用的。
A compact liquid crystal (LC) based tunable wideband microstrip bandstop filter (BSF) is presented in this paper. To realize a compact size and wide stopband bandwidth, a double-stub bending structure was designed. The BSF stopbands can be tuned by applying a voltage between 0-20 V to regulate the LC dielectric permittivity. A tunability >7% and 3dB bandwidth > 3 GHz and 2.5 GHz for the first and second stopbands respectively were achieved. The rejection level was higher than 41 dB. Such a LC based BSF device with a high tunability, wide stopband bandwidth, low driving voltage and compact size are useful in a wide range of applications.