| 宽阻带小型化双频带通滤波器 |
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| 引用本文： | 李萌萌 窦江玲 沈 韬. 宽阻带小型化双频带通滤波器[J]. 微波学报, 2022, 38(6): 71-73 |
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| 作者姓名： | 李萌萌 窦江玲 沈 韬 |
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| 作者单位： | 昆明理工大学 信息工程与自动化学院, 昆明 650500 |
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| 基金项目： | 云南省教育厅科学研究基金(2021J0045);云南省科技厅科技计划(202101AU070164);昆明理工大学校级人培计划(241120200025) |
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| 摘 要： | 文中提出了一种具有宽阻带的紧凑型双频带通滤波器,它采用了折叠短路枝节负载谐振器、紧凑型微带单元谐振器(CMRC)和阶跃阻抗谐振器结构。由于多个谐振器产生了五个可控传输零点(TZ),该滤波器实现了两个通带之间的良好隔离度以及宽阻带特性。制作并测试了尺寸紧凑的双频带通滤波器实验样品,测试结果显示,第一通带和第二通带的中心频率/ 插入损耗分别为0. 66 GHz/0. 8 dB 和1. 73 GHz/0. 7 dB,阻带频率高达10. 5 GHz,抑制水平超过15 dB。
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| 关 键 词： | 紧凑型微带单元谐振器 双频带通滤波器 短路枝节负载谐振器 阶跃阻抗谐振器 传输零点 |
Miniaturised Dual-band Bandpass Filter with Wide Stopband |
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| LI Meng-meng,DOU Jiang-ling,SHEN Tao. Miniaturised Dual-band Bandpass Filter with Wide Stopband[J]. Journal of Microwaves, 2022, 38(6): 71-73 |
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| Authors: | LI Meng-meng DOU Jiang-ling SHEN Tao |
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| Affiliation: | Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, China |
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| Abstract: | A compact dual-band bandpass filter with wide stopband is proposed in this paper. Folded short-circuitstub-loaded resonators, compact microstrip cell resonators(CMRC), and stepped-impedance resonators are adopted in the filterdesign. Good isolation between two passbands and wide stopband are achieved due to five controllable transmission zeros(TZ) generated by multiple resonators. A dual-band filter with compact size is fabricated and tested. The measured centerfrequencies and insertion loss of the first and second passbands are 0. 66 GHz/0. 8 dB and 1. 73 GHz/0. 7 dB, respectively.The stopband frequency is up to 10. 5 GHz with more than 15 dB rejection level. |
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| Keywords: | compact microstrip cell resonator dual-band bandpass filter short-circuit stub-loaded resonator stepped-impedance resonator transmission zero |
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