Direct design method for wideband quadruplet and higher‐order bandpass filters with a pair of transmission zeros based on explicit design formulas
Abstract This paper presents a direct design approach and explicit design formulas for a wideband quadruplet bandpass filter with a pair of transmission zeros. A filter can be designed based on a filter schematic composed of only transmission lines and a short‐circuited coupled‐line section. The ele...
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| Format: | Article |
| Language: | English |
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Wiley
2024-12-01
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| Series: | IET Microwaves, Antennas & Propagation |
| Subjects: | |
| Online Access: | https://doi.org/10.1049/mia2.12530 |
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| _version_ | 1846110637628850176 |
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| author | Juseop Lee Hyunjong Choi Jongheun Lee Minhyup Song |
| author_facet | Juseop Lee Hyunjong Choi Jongheun Lee Minhyup Song |
| author_sort | Juseop Lee |
| collection | DOAJ |
| description | Abstract This paper presents a direct design approach and explicit design formulas for a wideband quadruplet bandpass filter with a pair of transmission zeros. A filter can be designed based on a filter schematic composed of only transmission lines and a short‐circuited coupled‐line section. The electrical length of all lines including the coupled‐line section is 90°. The impedances of all lines can be calculated by explicit design formulas given in terms of the normalised coupling values in a coupling matrix of a quadruplet filter, which differentiates this work from existing design approaches. A fourth‐order filter example is illustrated for demonstrating the practicality of using the presented structure and design formulas. This paper also discusses the expansion of the presented direct design approach for higher‐order filter designs. |
| format | Article |
| id | doaj-art-c69807b778844d4db2f6d78a4548c0a1 |
| institution | Kabale University |
| issn | 1751-8725 1751-8733 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Microwaves, Antennas & Propagation |
| spelling | doaj-art-c69807b778844d4db2f6d78a4548c0a12024-12-23T18:53:51ZengWileyIET Microwaves, Antennas & Propagation1751-87251751-87332024-12-0118121084109310.1049/mia2.12530Direct design method for wideband quadruplet and higher‐order bandpass filters with a pair of transmission zeros based on explicit design formulasJuseop Lee0Hyunjong Choi1Jongheun Lee2Minhyup Song3The College of Informatics Korea University Seoul South KoreaThe College of Informatics Korea University Seoul South KoreaThe College of Informatics Korea University Seoul South KoreaPhotonic/Wireless Devices Research Division Electronics and Telecommunications Research Institute Daejeon South KoreaAbstract This paper presents a direct design approach and explicit design formulas for a wideband quadruplet bandpass filter with a pair of transmission zeros. A filter can be designed based on a filter schematic composed of only transmission lines and a short‐circuited coupled‐line section. The electrical length of all lines including the coupled‐line section is 90°. The impedances of all lines can be calculated by explicit design formulas given in terms of the normalised coupling values in a coupling matrix of a quadruplet filter, which differentiates this work from existing design approaches. A fourth‐order filter example is illustrated for demonstrating the practicality of using the presented structure and design formulas. This paper also discusses the expansion of the presented direct design approach for higher‐order filter designs.https://doi.org/10.1049/mia2.12530band‐pass filtersmicrostrip filters |
| spellingShingle | Juseop Lee Hyunjong Choi Jongheun Lee Minhyup Song Direct design method for wideband quadruplet and higher‐order bandpass filters with a pair of transmission zeros based on explicit design formulas IET Microwaves, Antennas & Propagation band‐pass filters microstrip filters |
| title | Direct design method for wideband quadruplet and higher‐order bandpass filters with a pair of transmission zeros based on explicit design formulas |
| title_full | Direct design method for wideband quadruplet and higher‐order bandpass filters with a pair of transmission zeros based on explicit design formulas |
| title_fullStr | Direct design method for wideband quadruplet and higher‐order bandpass filters with a pair of transmission zeros based on explicit design formulas |
| title_full_unstemmed | Direct design method for wideband quadruplet and higher‐order bandpass filters with a pair of transmission zeros based on explicit design formulas |
| title_short | Direct design method for wideband quadruplet and higher‐order bandpass filters with a pair of transmission zeros based on explicit design formulas |
| title_sort | direct design method for wideband quadruplet and higher order bandpass filters with a pair of transmission zeros based on explicit design formulas |
| topic | band‐pass filters microstrip filters |
| url | https://doi.org/10.1049/mia2.12530 |
| work_keys_str_mv | AT juseoplee directdesignmethodforwidebandquadrupletandhigherorderbandpassfilterswithapairoftransmissionzerosbasedonexplicitdesignformulas AT hyunjongchoi directdesignmethodforwidebandquadrupletandhigherorderbandpassfilterswithapairoftransmissionzerosbasedonexplicitdesignformulas AT jongheunlee directdesignmethodforwidebandquadrupletandhigherorderbandpassfilterswithapairoftransmissionzerosbasedonexplicitdesignformulas AT minhyupsong directdesignmethodforwidebandquadrupletandhigherorderbandpassfilterswithapairoftransmissionzerosbasedonexplicitdesignformulas |