Highly compact quad‐band bandpass filter with flexibly controllable passbands
Abstract This letter reports a highly compact microstrip quad‐band bandpass filter based on two folded λ/4 stepped impedance resonators and three folded dual‐mode short stub‐loaded resonators. The two stepped impedance resonators not only form the first passband but also serve as the feed structure...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-03-01
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| Series: | Electronics Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1049/ell2.12023 |
| _version_ | 1818051026633097216 |
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| author | Fan Zhang Yang Gao Yi Wang Yi Zhang Yuliang Dong Jun Xu |
| author_facet | Fan Zhang Yang Gao Yi Wang Yi Zhang Yuliang Dong Jun Xu |
| author_sort | Fan Zhang |
| collection | DOAJ |
| description | Abstract This letter reports a highly compact microstrip quad‐band bandpass filter based on two folded λ/4 stepped impedance resonators and three folded dual‐mode short stub‐loaded resonators. The two stepped impedance resonators not only form the first passband but also serve as the feed structure and provide the source‐load coupling path for the three higher passbands created by the short stub‐loaded resonators. Thus, a compact size can be obtained, and three pairs of transmission zeros can be realised near the three higher passbands to improve the frequency selectivity. It has been shown that the centre frequencies and bandwidths of the four passbands can be controlled independently. A microstrip quad‐band bandpass filter centred at 1.1/2.05/3/3.55 GHz is implemented and tested achieving an extremely small size of 0.07λg × 0.14λg, where λg is the guided wavelength at 1.1 GHz. This presents one of the smallest quad‐band bandpass filter ever demonstrated in the literature. |
| first_indexed | 2024-12-10T11:02:49Z |
| format | Article |
| id | doaj.art-cb63422f3ed94c68a8fbc7b932a3961d |
| institution | Directory Open Access Journal |
| issn | 0013-5194 1350-911X |
| language | English |
| last_indexed | 2024-12-10T11:02:49Z |
| publishDate | 2021-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Electronics Letters |
| spelling | doaj.art-cb63422f3ed94c68a8fbc7b932a3961d2022-12-22T01:51:38ZengWileyElectronics Letters0013-51941350-911X2021-03-0157727627810.1049/ell2.12023Highly compact quad‐band bandpass filter with flexibly controllable passbandsFan Zhang0Yang Gao1Yi Wang2Yi Zhang3Yuliang Dong4Jun Xu5School of Physics University of Electronic Science and Technology of China Chengdu People's Republic of ChinaDepartment of information Engineering Zhengzhou University Zhengzhou People's Republic of ChinaDepartment of Electronic Electrical and Systems Engineering University of Birmingham Birmingham UKSchool of Physics University of Electronic Science and Technology of China Chengdu People's Republic of ChinaChengdu Aeronautic Polytechnic Chengdu People's Republic of ChinaSchool of Physics University of Electronic Science and Technology of China Chengdu People's Republic of ChinaAbstract This letter reports a highly compact microstrip quad‐band bandpass filter based on two folded λ/4 stepped impedance resonators and three folded dual‐mode short stub‐loaded resonators. The two stepped impedance resonators not only form the first passband but also serve as the feed structure and provide the source‐load coupling path for the three higher passbands created by the short stub‐loaded resonators. Thus, a compact size can be obtained, and three pairs of transmission zeros can be realised near the three higher passbands to improve the frequency selectivity. It has been shown that the centre frequencies and bandwidths of the four passbands can be controlled independently. A microstrip quad‐band bandpass filter centred at 1.1/2.05/3/3.55 GHz is implemented and tested achieving an extremely small size of 0.07λg × 0.14λg, where λg is the guided wavelength at 1.1 GHz. This presents one of the smallest quad‐band bandpass filter ever demonstrated in the literature.https://doi.org/10.1049/ell2.12023Passive filters and other passive networksWaveguide and microwave transmission line components |
| spellingShingle | Fan Zhang Yang Gao Yi Wang Yi Zhang Yuliang Dong Jun Xu Highly compact quad‐band bandpass filter with flexibly controllable passbands Electronics Letters Passive filters and other passive networks Waveguide and microwave transmission line components |
| title | Highly compact quad‐band bandpass filter with flexibly controllable passbands |
| title_full | Highly compact quad‐band bandpass filter with flexibly controllable passbands |
| title_fullStr | Highly compact quad‐band bandpass filter with flexibly controllable passbands |
| title_full_unstemmed | Highly compact quad‐band bandpass filter with flexibly controllable passbands |
| title_short | Highly compact quad‐band bandpass filter with flexibly controllable passbands |
| title_sort | highly compact quad band bandpass filter with flexibly controllable passbands |
| topic | Passive filters and other passive networks Waveguide and microwave transmission line components |
| url | https://doi.org/10.1049/ell2.12023 |
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