Design of A High Attenuation a Microstrip Wide-Stopband Bandstop Filter Applied in Ku and K Bands

Ching‐Wen Tang, Chieh-Hsuan Yang
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Abstract

The compact microstrip bandstop filters with high attenuation and wide stopband have been developed. In order to realize the bandstop filter with broad stopband and great attenuation within the stopband, the coupled lines with single-ended ground have been adopted at both input and output ports. Moreover, for a greater fractional bandwidth, a higher impedance ratio Ze/Zo of the adopted coupled lines is required. The bandstop filter, with the attenuation of 40 dB and a fractional bandwidth of 60%, has been developed for applied in Ku and K bands to verify the proposed method.
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Ku和K波段高衰减微带宽阻带滤波器的设计
研制了具有高衰减和宽阻带的紧凑型微带带阻滤波器。为了实现宽阻带和大阻带内衰减的带阻滤波器,在输入端和输出端均采用单端接地的耦合线。此外,为了获得更大的分数带宽,所采用的耦合线的阻抗比Ze/Zo要求更高。为了验证所提出的方法,我们开发了一个带阻滤波器,其衰减为40 dB,分数带宽为60%,应用于Ku和K波段。
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