采用反馈式CRLH-TL单元电池的高选择性微带带通滤波器

Abdullah Alburaikan, Mohammed Aqeeli, G. Jawad, A. Biswas, Zhirun Hu
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引用次数: 0

摘要

提出了一种设计高选择性微带带通滤波器的简便方法。基于信号干扰的概念,采用复合右/左手传输线(CRLH - TL)单元的BPF的选择性得到了显著提高。因此,通过在反馈中使用单个耦合线段和CRLH TL单元格,可以实现高选择性、上阻带内多个传输零点和低插入损耗的带通滤波器。仿真结果表明,所提出的BPF具有8%的分数带宽,以2.4 GHz为中心,滚降率高达300 dB/GHz。
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High selectivity microstrip bandpass filter using feedback CRLH-TL unit cell
A new and simple approach to design high selectivity microstrip bandpass filter (BPF) is reported. Based on the signal interference concept, the selectivity of a BPF using composite right/left handed transmission line (CRLH TL) unit cell is significantly improved. Thus, by employing a single coupled line section and CRLH TL unit cell in the feedback, a bandpass filter with high selectivity, multiple transmission zeros (TZs) within the upper stopband and low insertion loss can be realized. The simulation results show that the proposed BPF has a fractional bandwidth of 8% centred at 2.4 GHz with high roll-off rate of 300 dB/GHz.
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