A High-Temperature Superconducting Bandpass Dual-Mode Filter with Tunable Relative Bandwidth and Center Frequency
This study proposes a high-temperature superconducting (HTS) bandpass filter with a continuously tunable bandwidth and center frequency. The proposed filter combines several gallium arsenide varactors and a dual-mode resonator (DMR). The even and odd modes of the DMR can be tuned simultaneously usin...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/3/1079 |
| _version_ | 1797623327452299264 |
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| author | Zhaojiang Shang Liejun Shen Jianyong Huang Huibin Zhang |
| author_facet | Zhaojiang Shang Liejun Shen Jianyong Huang Huibin Zhang |
| author_sort | Zhaojiang Shang |
| collection | DOAJ |
| description | This study proposes a high-temperature superconducting (HTS) bandpass filter with a continuously tunable bandwidth and center frequency. The proposed filter combines several gallium arsenide varactors and a dual-mode resonator (DMR). The even and odd modes of the DMR can be tuned simultaneously using a single bias voltage. The capacitive value of varactors in the circuit is tuned continuously under continuous voltage and frequency tunability. External couplings and the interstage can be realized using an interdigital coupling structure; a fixed capacitor is added to the feeder to improve its coupling strength. A low-insertion loss within the band is obtained using HTS technology. Additionally, the proposed filter is etched on a 0.5 mm-thick MgO substrate and combined with YBCO thin films for demonstration. For the as-fabricated device, the tuning frequency range of 1.22~1.34 GHz was 9.4%; the 3-dB fractional bandwidth was 12.95~17.39%, and the insertion loss was 2.28~3.59 dB. The simulation and experimental measurement results were highly consistent. |
| first_indexed | 2024-03-11T09:26:05Z |
| format | Article |
| id | doaj.art-5db15f4e39d5474a8680c21aad330b7b |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T09:26:05Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-5db15f4e39d5474a8680c21aad330b7b2023-11-16T17:55:51ZengMDPI AGSensors1424-82202023-01-01233107910.3390/s23031079A High-Temperature Superconducting Bandpass Dual-Mode Filter with Tunable Relative Bandwidth and Center FrequencyZhaojiang Shang0Liejun Shen1Jianyong Huang2Huibin Zhang3College of Sciences, Shanghai Institute of Technology, Shanghai 201418, ChinaCollege of Sciences, Shanghai Institute of Technology, Shanghai 201418, ChinaCollege of Sciences, Shanghai Institute of Technology, Shanghai 201418, ChinaCollege of Sciences, Shanghai Institute of Technology, Shanghai 201418, ChinaThis study proposes a high-temperature superconducting (HTS) bandpass filter with a continuously tunable bandwidth and center frequency. The proposed filter combines several gallium arsenide varactors and a dual-mode resonator (DMR). The even and odd modes of the DMR can be tuned simultaneously using a single bias voltage. The capacitive value of varactors in the circuit is tuned continuously under continuous voltage and frequency tunability. External couplings and the interstage can be realized using an interdigital coupling structure; a fixed capacitor is added to the feeder to improve its coupling strength. A low-insertion loss within the band is obtained using HTS technology. Additionally, the proposed filter is etched on a 0.5 mm-thick MgO substrate and combined with YBCO thin films for demonstration. For the as-fabricated device, the tuning frequency range of 1.22~1.34 GHz was 9.4%; the 3-dB fractional bandwidth was 12.95~17.39%, and the insertion loss was 2.28~3.59 dB. The simulation and experimental measurement results were highly consistent.https://www.mdpi.com/1424-8220/23/3/1079high-temperature superconducting (HTS)bandpass filter (BPF)varactordual-mode resonator (DMR)tunable |
| spellingShingle | Zhaojiang Shang Liejun Shen Jianyong Huang Huibin Zhang A High-Temperature Superconducting Bandpass Dual-Mode Filter with Tunable Relative Bandwidth and Center Frequency Sensors high-temperature superconducting (HTS) bandpass filter (BPF) varactor dual-mode resonator (DMR) tunable |
| title | A High-Temperature Superconducting Bandpass Dual-Mode Filter with Tunable Relative Bandwidth and Center Frequency |
| title_full | A High-Temperature Superconducting Bandpass Dual-Mode Filter with Tunable Relative Bandwidth and Center Frequency |
| title_fullStr | A High-Temperature Superconducting Bandpass Dual-Mode Filter with Tunable Relative Bandwidth and Center Frequency |
| title_full_unstemmed | A High-Temperature Superconducting Bandpass Dual-Mode Filter with Tunable Relative Bandwidth and Center Frequency |
| title_short | A High-Temperature Superconducting Bandpass Dual-Mode Filter with Tunable Relative Bandwidth and Center Frequency |
| title_sort | high temperature superconducting bandpass dual mode filter with tunable relative bandwidth and center frequency |
| topic | high-temperature superconducting (HTS) bandpass filter (BPF) varactor dual-mode resonator (DMR) tunable |
| url | https://www.mdpi.com/1424-8220/23/3/1079 |
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