摘要
基于螺旋交指结构设计了一种新型的带阻谐振单元，并采用全波仿真软件对其进行分析。仿真结果表明，在此谐振单元中存在2个较窄的阻带，改变单元结构的尺寸可分别控制2个阻带的位置。在此基础上，采用2个单元级联的方式设计并加工了一款具有优越电磁性能的结构紧凑的双频带阻滤波器。采用矢量网络分析仪对所设计的滤波器进行测试，测试和仿真结果吻合较好，2个阻带的中心频率为3．30GHz和4．93GHz，对应的阻带带宽分别为3．23～3．37GHz和4．73～5．10GHz，阻带边缘陡峭度大于90dB／GHz，所设计的带阻滤波器具有优越的性能。此外，该滤波器的有效尺寸为24．0mm×5．2mm，与传统带阻滤波器相比较，小型化优势明显。
A novel bandstop resonant cell based on spiraMnterdigital structure is designed and analyzed by using the full-wave simulation software. The simulated results indicate that there are two narrow stopbands in the pro- posed resonant cell, and the positions of the two narrow stopbands can be controlled respectively by changing the physical dimensions of the cell. Then, a compact dual-band bandstop filter with good electromagnetic performances is designed and fabricated by cascading two cells. The filter is measured by the vector network analyzer and the measured and simulated results are in good agreement. The centre frequency of the two stopbands are 3.30 GHz and 4.93 GHz respectively, and the corresponding stopband bandwidth are 3.23-3.37 GHz and 4.73-5.10 GHz respec- tively. The sharpness of the stopband edge is greater than 90 dB/GHz, so this proposed filter has excellent perform-. antes. Moreover, the size of this filter is 24 mm× 5.2 mm, thus has obvious advantage of miniaturization in com- parison with the conventional bandstop filter.
出处
《压电与声光》
CSCD
北大核心
2014年第2期275-277,281,共4页
Piezoelectrics & Acoustooptics
关键词
带阻滤波器
螺旋交指结构
双频
bandstop filter
spiral-interdigital structure
dual-band
