A novel bandstop filter with wide stopband using signal interference technology

作者：Zhu, Hao Ran; Shen, Wei; Mao, Jun Fa

来源：2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology, MMWCST 2012, China,Sichuan,Chengdu, 2012-04-19 to 2012-04-20.

DOI：10.1109/MMWCST.2012.6238131

• Electrical length
• Measured results
• Microstrip bandstop filters
• Open-loop resonators
• Printed circuit board technology
• Signal interference techniques
• Transmission poles
• Transmission zeros

In this paper, we present a novel microstrip bandstop filter, where signal interference technology is applied for achieving the bandstop behavior. Two open loop resonators are introduced to instead the conventional transmission line with larger electrical length. Then, two transmission zeros can be obtained in the stopband. Meanwhile, several transmission poles are used to improve the flatness of the passband. In comparison with the traditional bandstop filters using signal interference technique, the proposed filter has wider stopband and flat passband. Finally, a filter sample is fabricated using the standard single layer printed circuit board technology, and measured results agrees well with the simulated ones.

• 出版日期2012
• 单位上海交通大学