A Compact Four-Pole Tunable HTS Bandpass Filter at VHF Band

Xu Wang; Jia Wang; Chunguang Li; Yun Wu; Xueqiang Zhang; Jinhao Dai; Yuefeng Yuan; Chi Zhang; Yusheng He; Liang Sun

doi:10.1109/TASC.2021.3091715

A Compact Four-Pole Tunable HTS Bandpass Filter at VHF Band

Xu Wang, Jia Wang, Chunguang Li, Yun Wu, Xueqiang Zhang, Jinhao Dai, Yuefeng Yuan, Chi Zhang, Yusheng He, Liang Sun^*

^*Corresponding author for this work

CAS - Institute of Physics

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

6 Citations (Scopus)

Abstract

This article presents a compact, low loss, wide tuning range, high temperature superconducting (HTS) bandpass filter at very high frequency (VHF) band. The filter consists of four zigzag open-loop resonators loaded with gallium arsenide (GaAs) varactors as tuning elements. Each resonator is biased independently. The filter circuit is fabricated on a 3-inch HTS thin film deposited on a LaAlO3 substrate. The filter demonstrates a frequency tuning range of 73.2-118 MHz, which is a tunability of 48%, an insertion loss of 0.6-2.2 dB, and a 3-dB fractional bandwidth of 3.2-4.3%. Besides, the return loss of the filter is better than 16.6 dB in the whole tuning range, with slight adjustment of bias voltages for different resonators.

Original language	English
Article number	9463788
Journal	IEEE Transactions on Applied Superconductivity
Volume	31
Issue number	6
DOIs	https://doi.org/10.1109/TASC.2021.3091715
Publication status	Published - Sept 2021
Externally published	Yes

Keywords

Bandpass filters
high temperature superconductors (HTS)
tunable filters
varactors

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10.1109/TASC.2021.3091715

Cite this

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title = "A Compact Four-Pole Tunable HTS Bandpass Filter at VHF Band",

abstract = "This article presents a compact, low loss, wide tuning range, high temperature superconducting (HTS) bandpass filter at very high frequency (VHF) band. The filter consists of four zigzag open-loop resonators loaded with gallium arsenide (GaAs) varactors as tuning elements. Each resonator is biased independently. The filter circuit is fabricated on a 3-inch HTS thin film deposited on a LaAlO3 substrate. The filter demonstrates a frequency tuning range of 73.2-118 MHz, which is a tunability of 48%, an insertion loss of 0.6-2.2 dB, and a 3-dB fractional bandwidth of 3.2-4.3%. Besides, the return loss of the filter is better than 16.6 dB in the whole tuning range, with slight adjustment of bias voltages for different resonators.",

keywords = "Bandpass filters, high temperature superconductors (HTS), tunable filters, varactors",

author = "Xu Wang and Jia Wang and Chunguang Li and Yun Wu and Xueqiang Zhang and Jinhao Dai and Yuefeng Yuan and Chi Zhang and Yusheng He and Liang Sun",

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journal = "IEEE Transactions on Applied Superconductivity",

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AU - Wang, Xu

AU - Wang, Jia

AU - Li, Chunguang

AU - Wu, Yun

AU - Zhang, Xueqiang

AU - Dai, Jinhao

AU - Yuan, Yuefeng

AU - Zhang, Chi

AU - He, Yusheng

AU - Sun, Liang

PY - 2021/9

Y1 - 2021/9

N2 - This article presents a compact, low loss, wide tuning range, high temperature superconducting (HTS) bandpass filter at very high frequency (VHF) band. The filter consists of four zigzag open-loop resonators loaded with gallium arsenide (GaAs) varactors as tuning elements. Each resonator is biased independently. The filter circuit is fabricated on a 3-inch HTS thin film deposited on a LaAlO3 substrate. The filter demonstrates a frequency tuning range of 73.2-118 MHz, which is a tunability of 48%, an insertion loss of 0.6-2.2 dB, and a 3-dB fractional bandwidth of 3.2-4.3%. Besides, the return loss of the filter is better than 16.6 dB in the whole tuning range, with slight adjustment of bias voltages for different resonators.

AB - This article presents a compact, low loss, wide tuning range, high temperature superconducting (HTS) bandpass filter at very high frequency (VHF) band. The filter consists of four zigzag open-loop resonators loaded with gallium arsenide (GaAs) varactors as tuning elements. Each resonator is biased independently. The filter circuit is fabricated on a 3-inch HTS thin film deposited on a LaAlO3 substrate. The filter demonstrates a frequency tuning range of 73.2-118 MHz, which is a tunability of 48%, an insertion loss of 0.6-2.2 dB, and a 3-dB fractional bandwidth of 3.2-4.3%. Besides, the return loss of the filter is better than 16.6 dB in the whole tuning range, with slight adjustment of bias voltages for different resonators.

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KW - high temperature superconductors (HTS)

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KW - varactors

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A Compact Four-Pole Tunable HTS Bandpass Filter at VHF Band

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Keywords

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