Quasi-Elliptic Higher-Order Tunable Bandpass Filter With Constant Absolute Bandwidth Using Synchronously Tuned Dual-Mode Resonators
Designing a higher-order tunable bandpass filter (BPF) with constant absolute bandwidth (ABW) and identical passband response at every passband frequency tuning state is considered a challenge. In this paper, we propose quasi-elliptic higher-order tunable BPFs that use synchronously tuned dual-mode...
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| Format: | Article |
| Language: | English |
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IEEE
2023-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/10235993/ |
| _version_ | 1827820724323090432 |
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| author | Girdhari Chaudhary Yongchae Jeong |
| author_facet | Girdhari Chaudhary Yongchae Jeong |
| author_sort | Girdhari Chaudhary |
| collection | DOAJ |
| description | Designing a higher-order tunable bandpass filter (BPF) with constant absolute bandwidth (ABW) and identical passband response at every passband frequency tuning state is considered a challenge. In this paper, we propose quasi-elliptic higher-order tunable BPFs that use synchronously tuned dual-mode resonators, which can achieve identical passband frequency response and constant ABW. To achieve identical passband frequency response and constant ABW, all frequency-dependent coupling coefficient and external quality factor are physically realized using series capacitor and shunt varactor. To achieve quasi-elliptic response, transmission zeros are generated at lower and upper sides of passband through cross-coupling between dual-mode resonators. For experimental validation, a prototype of 4th and 6th-order BPFs are designed and fabricated. Experimental results reveal that the passband center frequency of the 4th-order tunable BPF can be tuned from 1.35 to 1.75 GHz (25.82%) with identical passband return loss (RL) of 20 dB and 1-dB constant ABW of 92 ± 1.3 MHz. Similarly, the passband center frequency of 6th-order BPF can be tuned from 1.38 to 1.77 GHz (27.76%) with an identical passband RL of 20 dB and 1-dB constant ABW of 98 ± 1.5 MHz. |
| first_indexed | 2024-03-12T01:32:10Z |
| format | Article |
| id | doaj.art-57c12181cb124812a237cc564367c92e |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-03-12T01:32:10Z |
| publishDate | 2023-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-57c12181cb124812a237cc564367c92e2023-09-11T23:01:23ZengIEEEIEEE Access2169-35362023-01-0111950519505910.1109/ACCESS.2023.331093410235993Quasi-Elliptic Higher-Order Tunable Bandpass Filter With Constant Absolute Bandwidth Using Synchronously Tuned Dual-Mode ResonatorsGirdhari Chaudhary0https://orcid.org/0000-0003-2060-9860Yongchae Jeong1https://orcid.org/0000-0001-8778-5776JIANT-IT Human Resource Development Center, Division of Electronics Engineering, Jeonbuk National University, Jeonju-si, South KoreaDivision of Electronics Engineering, Jeonbuk National University, Jeonju-si, South KoreaDesigning a higher-order tunable bandpass filter (BPF) with constant absolute bandwidth (ABW) and identical passband response at every passband frequency tuning state is considered a challenge. In this paper, we propose quasi-elliptic higher-order tunable BPFs that use synchronously tuned dual-mode resonators, which can achieve identical passband frequency response and constant ABW. To achieve identical passband frequency response and constant ABW, all frequency-dependent coupling coefficient and external quality factor are physically realized using series capacitor and shunt varactor. To achieve quasi-elliptic response, transmission zeros are generated at lower and upper sides of passband through cross-coupling between dual-mode resonators. For experimental validation, a prototype of 4th and 6th-order BPFs are designed and fabricated. Experimental results reveal that the passband center frequency of the 4th-order tunable BPF can be tuned from 1.35 to 1.75 GHz (25.82%) with identical passband return loss (RL) of 20 dB and 1-dB constant ABW of 92 ± 1.3 MHz. Similarly, the passband center frequency of 6th-order BPF can be tuned from 1.38 to 1.77 GHz (27.76%) with an identical passband RL of 20 dB and 1-dB constant ABW of 98 ± 1.5 MHz.https://ieeexplore.ieee.org/document/10235993/Dual-mode resonatorsidentical passband responsetunable bandpass filters |
| spellingShingle | Girdhari Chaudhary Yongchae Jeong Quasi-Elliptic Higher-Order Tunable Bandpass Filter With Constant Absolute Bandwidth Using Synchronously Tuned Dual-Mode Resonators IEEE Access Dual-mode resonators identical passband response tunable bandpass filters |
| title | Quasi-Elliptic Higher-Order Tunable Bandpass Filter With Constant Absolute Bandwidth Using Synchronously Tuned Dual-Mode Resonators |
| title_full | Quasi-Elliptic Higher-Order Tunable Bandpass Filter With Constant Absolute Bandwidth Using Synchronously Tuned Dual-Mode Resonators |
| title_fullStr | Quasi-Elliptic Higher-Order Tunable Bandpass Filter With Constant Absolute Bandwidth Using Synchronously Tuned Dual-Mode Resonators |
| title_full_unstemmed | Quasi-Elliptic Higher-Order Tunable Bandpass Filter With Constant Absolute Bandwidth Using Synchronously Tuned Dual-Mode Resonators |
| title_short | Quasi-Elliptic Higher-Order Tunable Bandpass Filter With Constant Absolute Bandwidth Using Synchronously Tuned Dual-Mode Resonators |
| title_sort | quasi elliptic higher order tunable bandpass filter with constant absolute bandwidth using synchronously tuned dual mode resonators |
| topic | Dual-mode resonators identical passband response tunable bandpass filters |
| url | https://ieeexplore.ieee.org/document/10235993/ |
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