A Constant Absolute Bandwidth Tunable Combline Bandpass Filter

摘要：

　　This paper presents a novel two-pole constant absolute bandwidth tunable combline bandpass filter with controllable coupling coefficient.The combline bandpass filter can be divided two parts: coupling section and non-coupling section.By controlling the length ratio of the coupling section and non-coupling section while maintaining the total length unchanged,the external quality Qext maintain stationary and the coupling coefficient k can be tuned to desirabl e values to meet the requirement of constant absolute bandwidth.The filter is designed on F4b-2 substrate with ωr =2.65 and 0.5 mm.The measured results show that the frequency can be tuned from 1.13 to 1.53 GHz with a 3-dB absolute bandwidth 80±4MHz.The tested results show good agreement with the simulated results.

作者: X.-G.Huang Q.-Y.Feng Q.-Y.Xiang D.-H.Jia

作者单位: School of Information Science and Technology Southwest Jiaotong University,Chengdu,Sichuan 610031,China

会议类型: 国际会议

会议名称: Progress in Electromagnetics Research Symposium 2013(2013年电磁学研究新进展学术研讨会)

会议地点: 台北

会议语种:英文

页码: 1126-1129

在线出版日期: 2013-03-01（万方平台首次上网日期，不代表论文的发表时间）