Quasi-Elliptic UWB Bandpass Filter Using Multilayer Liquid Crystal Polymer Technology
Quasi-Elliptic UWB Bandpass Filter Using Multilayer Liquid Crystal Polymer Technology
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DOI：
10.1109/lmwc.2010.2042551
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发表时间：
2010-03
影响因子：
3
通讯作者：
Z. Hao;Jiasheng Hong
中科院分区：
文献类型：
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作者：
Z. Hao;Jiasheng Hong
提出了一种基于非均匀周期结构的准椭圆响应超宽带（UWB）带通滤波器。在设计中，提出并研究了一种周期单元结构，该结构可以在上下阻带同时提供传输零点，以提高选择性。提出的周期单元结构由宽边耦合片、开槽地和嵌入四分之一波长谐振腔组成。它可以使用具有紧凑尺寸的多层结构来实现。通过将几个非均匀周期单元级联，可以设计出具有多个传输零的高选择性超宽带BPF。通过全波仿真，研制了一个具有五个周期单元的超宽带BPF。采用多层液晶聚合物技术实现了设计的样机。实验结果表明，所制备的滤波器具有超宽分数带宽、宽阻带和高选择性，具有准椭圆响应。该滤波器适用于超宽带通信和雷达系统。
A novel ultra-wideband (UWB) bandpass filter (BPF) with quasi-elliptic response using non-uniform periodical structures is presented. In the design, a periodical unit structure is proposed and studied, which can provide transmission zeros at both lower and upper stopbands to improve the selectivity. The proposed periodical unit structure consists of broadside coupling patches, slotted ground and embedded quarter-wavelength resonator. It can be implemented using a multilayer structure with a compact size. A high selectivity UWB BPF with multiple transmission zeros can be designed by cascading a few proposed non-uniform periodical units. As a demonstration, a UWB BPF with five periodical units is developed by full-wave simulation. Multilayer liquid crystal polymer technology is used to implement the designed prototype. The predicted results are verified by the experiments, which show that the fabricated filter has an ultra wide fractional bandwidth, a wide stopband and a high selectivity with quasi-elliptic response. The proposed filter is attractive for UWB communication and radar systems.