[1] Chen Zhenhua, Xu Jinping,. W-band sharp-rejection bandpass filter with notch cavities [J]. Journal of Southeast University (English Edition), 2013, 29 (1): 11-15. [doi:10.3969/j.issn.1003-7985.2013.01.003]
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W-band sharp-rejection bandpass filter with notch cavities(
)
带有陷波腔的W波段高截止特性带通滤波器
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 29
- Issue:
- 2013 1
- Page:
- 11-15
- Research Field:
- Electronic Science and Engineering
- Publishing date:
- 2013-03-20
Info
- Title:
- W-band sharp-rejection bandpass filter with notch cavities
- 带有陷波腔的W波段高截止特性带通滤波器
- Author(s):
- Chen Zhenhua; Xu Jinping
- State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China
- Keywords:
- W-band; E-plane filter; sharp rejection; notch filter
- PACS:
- TN713.5
- DOI:
- 10.3969/j.issn.1003-7985.2013.01.003
- Abstract:
- High-Q notch cavities combined with a low-order E-plane fin-line filter are used for designing a sharp-rejection band-pass filter(BPF)at W-band. Based on the conventional E-plane fin-line structure, an E-plane extended cavity is implemented to enhance the suppression at unwanted frequency points near the passband. The passband performance is not disturbed and the whole structure remains simple to be assembled. To extend the suppression bandwidth, two separated notch cavities are designed and arranged at the input and output ends of the fin-line filter, respectively. A prototype BPF is fabricated and measured. Experimental results show that the minimum insertion loss is 2.7 dB over a passband of 1 GHz. The suppression is about 85 dB near 91.7 GHz, which is 2.2 GHz lower than the center frequency. Experimental results agree well with simulation.
- 利用低阶E面鳍线滤波器结构, 结合高Q值陷波腔, 设计了一款具有高带外截止特性的W波段带通滤波器.在传统E面鳍线结构的基础上, 使用沿E面扩展的腔体增强对通带边缘特定频率的抑制, 同时保持滤波器的通带特性及整个滤波器结构的简易可行.为了扩展陷波频带的带宽, 在鳍线滤波器的输入和输出端设计了2个相互分离的陷波腔以产生不同的陷波频率.对所设计的滤波器进行了实物硬件的加工及实验测试, 实验结果表明, 在1 GHz的通带范围内, 最小插损为2.7 dB, 对偏离中心频率2.2 GHz处(即91.7 GHz)的抑制达到85 dB.实验结果与仿真设计吻合良好.
References:
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[8] Konishi Y, Uenakada K. The design of a bandpass filter with inductive strip-planar circuit mounted in waveguide [J]. IEEE Transactions on Microwave Theory and Techniques, 1974, 22(10): 869-873.
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Memo
- Memo:
-
Biographies: Chen Zhenhua(1984—), male, graduate; Xu Jinping(corresponding author), male, doctor, professor, jpxu@seu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.60921063).
Citation: Chen Zhenhua, Xu Jinping. W-band sharp-rejection bandpass filter with notch cavities[J].Journal of Southeast University(English Edition), 2013, 29(1):11-15.[doi:10.3969/j.issn.1003-7985.2013.01.003]