摘要
本文利用缺陷接地结构(DGS)设计了一种高性能的超宽带滤波器,该滤波器包括位于多模谐振器下面的六个半圆形的DGS.首先通过使用多模谐振原理得到一个超宽带带通滤波器,然后利用DGS结构设计了一个截止频率超过12.6GHz的低通滤波器,这样做的目的是抑制超宽带滤波器的寄生通带的影响.最后结合两者,得到一高性能种超宽带带通滤波器,使用ANSOFT HFSS软件建模仿真和优化,结果表明:该滤波器的中心频率在6.85 GHz,通带为3.0 GHz-10.6 GHz,通带内插入损耗小于0.3 dB,回波损耗优于20 dB.频带内具有良好的通带特性,同时又能有效的抑制高次谐波,上阻带在30 dB以下达到19 GHz.
In this paper,a high performance UWB bandpass filter using defected ground structure( DGS)was designed. The proposed BPF is composed of six DGSs that are positioned under the multiple- mode resonator. Firstly,multiple- mode resonator theory is used to design a UWB bandpass filter. Secondly,a lowpass filters using DGS are designed with their cut- off frequency slightly higher than 10. 6 GHz( upper-end),aiming at suppressing the spurious per- passband near the interested UWB passband. Combining these two structures we obtain a high performance UWB BPF,Then the software ANSOFT HFSS was used to simulating and optimizing. Results show that the center frequency of the filter is at 6. 85 GHz,the bandwidth is between 3. 02 GHz and 10. 6 GHz,in the pass- band,the insertion loss is less than 0. 3 dB and the return loss is more than 20 dB. The filter has desired performance,respectively,can suppress harmonics effectively,the upper- stopband with more than 30 dB attenuation is up to 19 GHz.
出处
《泰山学院学报》
2013年第6期91-96,共6页
Journal of Taishan University
基金
国家自然科学基金项目(51172034
61201001)
中央高校基本科研业务费专项资金(ZYGX2009J091)
