A Tunable Dual-band Bandpass Filter with Two Independently Tunable Passbands
In this paper,a novel tunable dual-band bandpass filter is proposed.Based on two quarter-wavelength resonators and one half-wavelength resonator,dual-band character is designed by introducing two independent coupling paths.Therefore,the whole filter structure can be divided into two parts and designed respectively.The Transmission Zeros(TZs)are derived through simulation.By varying the reverse bias voltage applied to the varactor diodes connected to the resonators,each passband can be tuned independently.Finally,the simulation results of the dual-band tunable filter shows a first tunable passband constant fractional-bandwidth range of 4.35±0.35%,a center frequency of 1.25-1.75GHz,a insertion loss of 4.25-2.16dB,and a second passband absolute-bandwith of 80±5MHz,a center frequency of 1.83-2.27GHz,a insertion loss of 2.75-1.97dB.
D.-H.Jia Q.-Y.Feng X.-G.Huang Q.-Y.Xiang
School of Information Science and Technology Southwest Jiaotong University,Chengdu,Sichuan 610031,China
国际会议
Progress in Electromagnetics Research Symposium 2013(2013年电磁学研究新进展学术研讨会)
台北
英文
1121-1125
2013-03-01（万方平台首次上网日期，不代表论文的发表时间）