Harmonic-Rejection Compact Bandpass Filter Using Defected Ground Structure for GPS Application
Harmonic-Rejection Compact Bandpass Filter Using Defected Ground Structure for GPS Application
复制标题
用于 GPS 应用的使用缺陷接地结构的谐波抑制紧凑带通滤波器
DOI：
10.1155/2014/436964
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发表时间：
2014
影响因子：
0.4
通讯作者：
Suping Peng
中科院分区：
文献类型：
--
作者：
Haiwen Liu;Baoping Ren;Xiang Xiao;Zhi‐Chong Zhang;Shen Li;Suping Peng
本文开发了一种采用缺陷接地结构（DGS）谐振器的小型带通滤波器（BPF），具有谐波抑制特性。所提出的 BPF 的二次和三次谐波被阶跃阻抗 DGS 谐振器的特性所抑制。此外，还建立了开路短截线，以便可以独立地创建两个可调节的传输零点，以扩展阻带并提高抑制水平。最后，针对 GPS 应用设计并实现了以 1.62GHz 为中心、阻带扩展到 5.6GHz 且抑制水平优于 20dB 的二阶 BPF。仿真和测量之间的良好一致性验证了该设计方法的有效性。
A miniaturized bandpass filter (BPF) using defected ground structure (DGS) resonator with the characteristic of harmonic rejection is developed in this paper. The second and third harmonics of the proposed BPF are rejected by the characteristic of stepped-impedance DGS resonator. Moreover, open stubs are established so that two adjustable transmission zeros can independently be created to extend the stopband and improve the rejection level. Finally, a second-order BPF, centered at 1.62 GHz with a stopband extended up to 5.6 GHz and a rejection level better than 20 dB, is designed and implemented for GPS application. A good agreement between simulation and measurement verifies the validity of this design methodology.