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一种高选择性的可调0.83~2.15 GHz带通滤波器

王显 张德伟 刘庆 吕大龙 张毅 杨松涛

王显, 张德伟, 刘庆, 等. 一种高选择性的可调0.83~2.15 GHz带通滤波器[J]. 强激光与粒子束, 2019, 31: 113001. doi: 10.11884/HPLPB201931.190257
引用本文: 王显, 张德伟, 刘庆, 等. 一种高选择性的可调0.83~2.15 GHz带通滤波器[J]. 强激光与粒子束, 2019, 31: 113001. doi: 10.11884/HPLPB201931.190257
Wang Xian, Zhang Dewei, Liu Qing, et al. A tunable 0.83-2.15 GHz bandpass filter with high selectivity[J]. High Power Laser and Particle Beams, 2019, 31: 113001. doi: 10.11884/HPLPB201931.190257
Citation: Wang Xian, Zhang Dewei, Liu Qing, et al. A tunable 0.83-2.15 GHz bandpass filter with high selectivity[J]. High Power Laser and Particle Beams, 2019, 31: 113001. doi: 10.11884/HPLPB201931.190257

一种高选择性的可调0.83~2.15 GHz带通滤波器

doi: 10.11884/HPLPB201931.190257
基金项目: 

核高基重大专项 2013ZX01010003-004

详细信息
    作者简介:

    王显(1994—), 男,硕士,主要从事微波电路方向的研究; 18595823270@163.com

  • 中图分类号: TN715

A tunable 0.83-2.15 GHz bandpass filter with high selectivity

  • 摘要: 设计了一种宽频率调节范围的高选择性可调带通滤波器。宽调节范围由一对简单的加载变容管的平行耦合线谐振器设计实现。由于谐振器之间存在电磁混合耦合以及通过加载变容管引入的源与负载频变耦合,该滤波器最终引入了三个自适应性传输零点。而且,三个传输零点在整个调节范围内能够保持相同的相对位置,因此,设计的滤波器实现了在整个宽频率调节范围内的高选择性和良好的带外抑制。同时,在中心频率调节的过程中,通过选择合适的耦合系数,该滤波器可以实现恒定的相对带宽。最终设计出的可调滤波器的调节范围为0.83~2.15 GHz, 可调范围可达88.6%,并保持9%±0.3%的相对带宽不变。测试结果表明该滤波器具备了高选择性和良好的带外抑制能力。
  • 图  1  提出的可调带通滤波器结构图

    Figure  1.  Configuration of the proposed tunable BPF

    图  2  提取出的耦合系数M12

    Figure  2.  Extracted M12

    图  3  在不同频率处提取出的Qe随变容管Cv2的变化

    Figure  3.  Extracted Qe at different frequency vs Cv2

    图  4  滤波器的耦合拓扑

    Figure  4.  Coupling scheme of the proposed filter

    图  5  变容管Cv3对传输零点的限制和作用

    Figure  5.  Effect and limitation of Cv3 on the transmission zeros

    图  6  滤波器的仿真及实物测试结果

    Figure  6.  Simulated and measured results of the proposed tunable filter

    表  1  列出的四个状态的性能参数及控制电压值

    Table  1.   Performance parameters and control voltage values of four states

    state f0/GHz FBW/% BW30 dB/BW3 dB V1/V V2/V V3/V
    1 0.83 8.72 4.86 0 0.9 0.9
    2 1.10 9.09 4.35 2.1 2 1.5
    3 1.60 9.17 4.20 6 4.2 3.5
    4 2.15 9.30 3.90 19.5 5.8 7.3
    下载: 导出CSV

    表  2  与之前的微带可调带通滤波器的性能对比

    Table  2.   Performance comparison of the presented design with previous reported tunable microstrip BPFs

    Ref. frequency tuning tuning range BW3 dB/MHz or FBW/% BW30 dB/BW3 dB return loss/dB insertion loss/dB circuit size/λg2
    Ref.[2] 1.62-1.96 GHz 19.0% 4.8%±0.3% N/A >20 2.84-2.9 0.134
    Ref.[4] 0.55-1.9 GHz 110.2% (92±6) MHz 5.7-9.4 >12 3.2-4.4 0.013
    Ref.[5] 1.1-2.1 GHz 63% 40 MHz N/A >14 4.4-6.1 0.206
    Ref.[8] 0.78-1.36 GHz 54.2% 103%±6 MHz N/A >12 1.68-2.9 N/A
    this paper 0.83-2.15 GHz 88.6% 9%±0.3 % 3.9-4.9 >23 2..3-3.2 0.037
    下载: 导出CSV
  • [1] Xiang Q, Feng Q, Huang X, et al. Electrical tunable microstrip LC bandpass filters with constant bandwidth[J]. IEEE Transactions on Microwave Theory and Techniques, 2013, 61(3): 1124-1130. doi: 10.1109/TMTT.2013.2241781
    [2] Tsai H Y, Huang T Y, Wu R B. Varactor-tuned compact dual-mode tunable filter with constant passband characteristics[J]. IEEE Transactions on Components, Packaging, and Manufacturing Technology, 2016, 6(9): 1399-1407. doi: 10.1109/TCPMT.2016.2599205
    [3] Feng W, Shang Y, Che W, et al. Multifunctional reconfigurable filter using transversal signal-interaction concepts[J]. IEEE Microwave and Wireless Components Letters, 2017, 27(11): 980-982. doi: 10.1109/LMWC.2017.2750022
    [4] Lin F, Rais-Zadeh M. Continuously tunable 0.55-1.9 GHz bandpass filter with a constant bandwidth using switchable varactor-tuned resonators[J]. IEEE Transactions on Microwave Theory and Techniques, 2017, 65(3): 792-803.
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    [6] Fan M, Song K, Zhu Y, et al. Compact bandpass-to-bandstop reconfigurable filter with wide tuning range[J]. IEEE Microwave and Wireless Components Letters, 2019: 1-3.
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    [9] Cai J, Chen J X, Zhang X F, et al. Electrically varactor-tuned bandpass filter with constant bandwidth and self-adaptive transmission zeros[J]. IET Microwaves, Antennas & Propagation, 2017, 11(11): 1542-1548.
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  • 被引次数: 0
出版历程
  • 收稿日期:  2019-07-05
  • 修回日期:  2019-08-30
  • 刊出日期:  2019-11-15

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