An Ultranarrowband High-Temperature Superconducting Bandpass Filter With a Fractional Bandwidth of 0.02%

Chunguang Li; Tao Yu; Yongbo Bian; Yun Wu; Jia Wang; Xueqiang Zhang; Liang Sun; Hong Li; Yusheng He

doi:10.1109/TASC.2016.2601650

An Ultranarrowband High-Temperature Superconducting Bandpass Filter With a Fractional Bandwidth of 0.02%

Chunguang Li^*, Tao Yu, Yongbo Bian, Yun Wu, Jia Wang, Xueqiang Zhang, Liang Sun, Hong Li, Yusheng He

^*Corresponding author for this work

CAS - Institute of Physics

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

This paper presents the design and fabrication of an ultranarrow band bandpass high-temperature superconducting filter with a fractional bandwidth of 0.02% in the C band. Novel approaches to solve the weak coupling and unwanted parasitic coupling problems in a narrowband filter design were introduced. The filter shows band rejection better than 23 dB at frequencies 500 kHz away from the center frequency. The measured minimum insertion loss is 3.8 dB, corresponding to unloaded Q-factors of about 45000. The return loss is better than 17 dB and the band edge steepness reaches over 60 dB/MHz at both the high- and low-frequency edges.

Original language	English
Article number	7547975
Journal	IEEE Transactions on Applied Superconductivity
Volume	26
Issue number	7
DOIs	https://doi.org/10.1109/TASC.2016.2601650
Publication status	Published - Oct 2016
Externally published	Yes

Keywords

Bandpass
filter
HTS
ultranarrow band

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10.1109/TASC.2016.2601650

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title = "An Ultranarrowband High-Temperature Superconducting Bandpass Filter With a Fractional Bandwidth of 0.02%",

abstract = "This paper presents the design and fabrication of an ultranarrow band bandpass high-temperature superconducting filter with a fractional bandwidth of 0.02% in the C band. Novel approaches to solve the weak coupling and unwanted parasitic coupling problems in a narrowband filter design were introduced. The filter shows band rejection better than 23 dB at frequencies 500 kHz away from the center frequency. The measured minimum insertion loss is 3.8 dB, corresponding to unloaded Q-factors of about 45000. The return loss is better than 17 dB and the band edge steepness reaches over 60 dB/MHz at both the high- and low-frequency edges.",

keywords = "Bandpass, filter, HTS, ultranarrow band",

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AU - Bian, Yongbo

AU - Wu, Yun

AU - Wang, Jia

AU - Zhang, Xueqiang

AU - Sun, Liang

AU - Li, Hong

AU - He, Yusheng

PY - 2016/10

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N2 - This paper presents the design and fabrication of an ultranarrow band bandpass high-temperature superconducting filter with a fractional bandwidth of 0.02% in the C band. Novel approaches to solve the weak coupling and unwanted parasitic coupling problems in a narrowband filter design were introduced. The filter shows band rejection better than 23 dB at frequencies 500 kHz away from the center frequency. The measured minimum insertion loss is 3.8 dB, corresponding to unloaded Q-factors of about 45000. The return loss is better than 17 dB and the band edge steepness reaches over 60 dB/MHz at both the high- and low-frequency edges.

AB - This paper presents the design and fabrication of an ultranarrow band bandpass high-temperature superconducting filter with a fractional bandwidth of 0.02% in the C band. Novel approaches to solve the weak coupling and unwanted parasitic coupling problems in a narrowband filter design were introduced. The filter shows band rejection better than 23 dB at frequencies 500 kHz away from the center frequency. The measured minimum insertion loss is 3.8 dB, corresponding to unloaded Q-factors of about 45000. The return loss is better than 17 dB and the band edge steepness reaches over 60 dB/MHz at both the high- and low-frequency edges.

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An Ultranarrowband High-Temperature Superconducting Bandpass Filter With a Fractional Bandwidth of 0.02%

Abstract

Keywords

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