Design of the UWB Bandpass Filter by Coupled Microstrip Lines with U-shaped Defected Ground Structure
A novel ultra-wideband (UWB) bandpass filter (BPF)is proposed by using coupled microstrip lines and U-shaped defected ground structure (DGS).The input and output feeding lines are connected to the endsInthe same side of the coupled microstrip lines on one side of a substrate,and the U-shaped DGS is introduced behind the coupled lines on the other side of the substrate. The coupling ofThis kind of structure,if without DGS,is very weak. However,the U-shaped DGS generatesA strong coupling,and improves the passband property of the coupled lines. The filter is simulated by 3D EM commercial software,and the results demonstrate good UWB performances. The passband defined by |S11|<-10 dB is about 3.44-10.6 GHz,and the insertion loss is about 0.11 dB at central frequency of 7 GHz. The group delay variation,which is an important factor to UWB system,isless than 0.5 ns within the operating band.
Zhihui Pan Junhong Wang
Key Lab of All Light Network & Advanced Telecommunication Network of EMC,Beijing Jiaotong University Key Lab of All Light Network & Advanced Telecommunication Network of EMC,Beijing Jiaotong University
国际会议
2008 International Conference on Microwave and Millimeter Wave Technology(2008国际微波毫米波技术会议)
南京
英文
329-332
2008-04-21（万方平台首次上网日期，不代表论文的发表时间）