Varactor-Based Continuously Tunable Microstrip Bandpass Filters: A Review, Issues and Future Trends
Electronically tuned bandpass filters are crucial frequency-selective devices in tunable RF front-ends and are extensively utilized in the fields of communications and sensing. For low-cost and easy integration, varactor based tunable microstrip filters have been widely used in circuit design. The m...
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| Format: | Article |
| Language: | English |
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IEEE
2024-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/10486926/ |
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| author | Mengjie Qin Zhongmao Li Zhipeng Ren Pengzhan Liu Lanlan Liao Xin Qiu Zhiqiang Li |
| author_facet | Mengjie Qin Zhongmao Li Zhipeng Ren Pengzhan Liu Lanlan Liao Xin Qiu Zhiqiang Li |
| author_sort | Mengjie Qin |
| collection | DOAJ |
| description | Electronically tuned bandpass filters are crucial frequency-selective devices in tunable RF front-ends and are extensively utilized in the fields of communications and sensing. For low-cost and easy integration, varactor based tunable microstrip filters have been widely used in circuit design. The miniaturization, tuning flexibility, and performance optimization of tunable microstrip filters are all areas of concern. This paper reviews the research conducted on the varactor-diode-based tunable bandpass filters over the past decade. Numerous filters with various structures are introduced in the following sequence: frequency tuning, frequency and bandwidth tuning, transmission zero tuning, and tunable bandpass filter with special functions. The existing problems and limitations of various types of tuned filters have been discussed. The performance of several outstanding works has been analyzed and compared. Finally, the development direction of varactor-based microstrip tunable filters is objectively summarized, which will advance the research of microstrip filters. |
| format | Article |
| id | doaj-art-9ca0b8f54f194b0dacfb8a80f8fd0654 |
| institution | Kabale University |
| issn | 2169-3536 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-9ca0b8f54f194b0dacfb8a80f8fd06542025-08-20T03:46:53ZengIEEEIEEE Access2169-35362024-01-0112574435745710.1109/ACCESS.2024.338378810486926Varactor-Based Continuously Tunable Microstrip Bandpass Filters: A Review, Issues and Future TrendsMengjie Qin0https://orcid.org/0009-0004-0880-9362Zhongmao Li1https://orcid.org/0000-0002-1108-4284Zhipeng Ren2Pengzhan Liu3https://orcid.org/0000-0002-7612-8671Lanlan Liao4Xin Qiu5https://orcid.org/0000-0002-6095-7213Zhiqiang Li6https://orcid.org/0009-0003-7463-8576Institute of Microelectronics, Chinese Academy of Sciences, Beijing, ChinaInstitute of Microelectronics, Chinese Academy of Sciences, Beijing, ChinaInstitute of Microelectronics, Chinese Academy of Sciences, Beijing, ChinaInstitute of Microelectronics, Chinese Academy of Sciences, Beijing, ChinaInstitute of Microelectronics, Chinese Academy of Sciences, Beijing, ChinaInstitute of Microelectronics, Chinese Academy of Sciences, Beijing, ChinaInstitute of Microelectronics, Chinese Academy of Sciences, Beijing, ChinaElectronically tuned bandpass filters are crucial frequency-selective devices in tunable RF front-ends and are extensively utilized in the fields of communications and sensing. For low-cost and easy integration, varactor based tunable microstrip filters have been widely used in circuit design. The miniaturization, tuning flexibility, and performance optimization of tunable microstrip filters are all areas of concern. This paper reviews the research conducted on the varactor-diode-based tunable bandpass filters over the past decade. Numerous filters with various structures are introduced in the following sequence: frequency tuning, frequency and bandwidth tuning, transmission zero tuning, and tunable bandpass filter with special functions. The existing problems and limitations of various types of tuned filters have been discussed. The performance of several outstanding works has been analyzed and compared. Finally, the development direction of varactor-based microstrip tunable filters is objectively summarized, which will advance the research of microstrip filters.https://ieeexplore.ieee.org/document/10486926/Microwave circuitmicrostrip filtertunable bandpass filtervaractor diodecontinuously tunable filter |
| spellingShingle | Mengjie Qin Zhongmao Li Zhipeng Ren Pengzhan Liu Lanlan Liao Xin Qiu Zhiqiang Li Varactor-Based Continuously Tunable Microstrip Bandpass Filters: A Review, Issues and Future Trends IEEE Access Microwave circuit microstrip filter tunable bandpass filter varactor diode continuously tunable filter |
| title | Varactor-Based Continuously Tunable Microstrip Bandpass Filters: A Review, Issues and Future Trends |
| title_full | Varactor-Based Continuously Tunable Microstrip Bandpass Filters: A Review, Issues and Future Trends |
| title_fullStr | Varactor-Based Continuously Tunable Microstrip Bandpass Filters: A Review, Issues and Future Trends |
| title_full_unstemmed | Varactor-Based Continuously Tunable Microstrip Bandpass Filters: A Review, Issues and Future Trends |
| title_short | Varactor-Based Continuously Tunable Microstrip Bandpass Filters: A Review, Issues and Future Trends |
| title_sort | varactor based continuously tunable microstrip bandpass filters a review issues and future trends |
| topic | Microwave circuit microstrip filter tunable bandpass filter varactor diode continuously tunable filter |
| url | https://ieeexplore.ieee.org/document/10486926/ |
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