Compact Reconfigurable Dual-band bandpass Filter with Constant Absolute Bandwidth

被引：0
|
作者：
Li, Zhang [1 ]
Bo, Liang [1 ]
机构：
[1] CETC, Res Inst 20, Xian 710068, Peoples R China
来源：
2018 INTERNATIONAL CONFERENCE ON MICROWAVE AND MILLIMETER WAVE TECHNOLOGY (ICMMT2018) | 2018年
关键词：
RESONATORS;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A compact dual-band bandpass filter (BPF) based on stepped impedance resonator (SIR) and defected-feeding structure is investigated in this paper. The SIR with T-stub centrally loaded provides more degrees of freedom to adjust the dual-band resonant frequencies. By combining the SIR with the defected-feeding structure and adjusting their dimensions, the absolute bandwidth can be easily controlled. Transmission zero is derived through simulation due to the combination of SIR and defected-feeding structure. Finally, simulation results show the second passband switched among 1.55 GHz, 1.75 GHz and 2.05 GHz with a constant absolute bandwidth of 230 MHz +/- 5.6%, and the first passband fixed at 0.90 GHz with a constant absolute bandwidth of 32 MHz. The measurement of the fabricated example shows good agreement with the simulation.
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页数：3
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