Novel Selective Feeding Scheme Integrated With SPDT Switches for a Reconfigurable Bandpass-to-Bandstop Filter
This paper demonstrates a new technique for designing high performance reconfigurable bandpass-to-bandstop filters by employing a ring resonator and a selective feeding scheme integrated with single-pole double-throw switches (SPDT). The transformation from bandpass-to-bandstop mode and vice-versa i...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2021-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9335968/ |
| _version_ | 1831588968499511296 |
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| author | Salman Arain Photos Vryonides Kashif Nisar Abdul Quddious Symeon Nikolaou |
| author_facet | Salman Arain Photos Vryonides Kashif Nisar Abdul Quddious Symeon Nikolaou |
| author_sort | Salman Arain |
| collection | DOAJ |
| description | This paper demonstrates a new technique for designing high performance reconfigurable bandpass-to-bandstop filters by employing a ring resonator and a selective feeding scheme integrated with single-pole double-throw switches (SPDT). The transformation from bandpass-to-bandstop mode and vice-versa is achieved by connecting or disconnecting two λ<sub>g</sub>/4 open-circuited stubs on the ring using PIN diodes. SPDT switches are employed for electronic switching between two different feeding line sections. In the bandpass state the resonator presents two transmission zeros near the edges of the passband and four attenuation poles inside the passband, enhancing the filter's performance, thus achieving excellent sharp rejection with high roll-off-rate (ROR<sub>20dB</sub>). On the other hand, high stopband rejection with wide bandwidth, good return loss and good skirt-band attenuation rates are achieved in the bandstop state. Even- and odd-mode analysis is adopted and closed-form expressions are derived to describe the filter's behaviour. To verify the validity of the proposed design, a prototype filter was fabricated and measured. In measurement, a 65% 3-dB bandwidth bandpass filter (BPF) with an insertion loss of 0.86 dB was switched to a 70% 20-dB bandwidth bandstop filter (BSF) with more than 40 dB stopband rejection. |
| first_indexed | 2024-12-18T00:34:43Z |
| format | Article |
| id | doaj.art-ec6fc284ecab4f0b91393571e37f22b2 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-18T00:34:43Z |
| publishDate | 2021-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-ec6fc284ecab4f0b91393571e37f22b22022-12-21T21:27:04ZengIEEEIEEE Access2169-35362021-01-019252332524410.1109/ACCESS.2021.30545919335968Novel Selective Feeding Scheme Integrated With SPDT Switches for a Reconfigurable Bandpass-to-Bandstop FilterSalman Arain0https://orcid.org/0000-0002-3269-5367Photos Vryonides1https://orcid.org/0000-0002-2625-2383Kashif Nisar2https://orcid.org/0000-0001-8092-4665Abdul Quddious3https://orcid.org/0000-0002-7417-4068Symeon Nikolaou4https://orcid.org/0000-0002-9234-9415Electrical Engineering Department, NFC-Institute of Engineering & Fertilizer Research, Faisalabad, PakistanFrederick Research Center (FRC), Frederick University, Nicosia, CyprusFaculty of Computing and Informatics, University Malaysia Sabah, Kota Kinabalu, MalaysiaKIOS Research and Innovation Center of Excellence, University of Cyprus, Nicosia, CyprusFrederick Research Center (FRC), Frederick University, Nicosia, CyprusThis paper demonstrates a new technique for designing high performance reconfigurable bandpass-to-bandstop filters by employing a ring resonator and a selective feeding scheme integrated with single-pole double-throw switches (SPDT). The transformation from bandpass-to-bandstop mode and vice-versa is achieved by connecting or disconnecting two λ<sub>g</sub>/4 open-circuited stubs on the ring using PIN diodes. SPDT switches are employed for electronic switching between two different feeding line sections. In the bandpass state the resonator presents two transmission zeros near the edges of the passband and four attenuation poles inside the passband, enhancing the filter's performance, thus achieving excellent sharp rejection with high roll-off-rate (ROR<sub>20dB</sub>). On the other hand, high stopband rejection with wide bandwidth, good return loss and good skirt-band attenuation rates are achieved in the bandstop state. Even- and odd-mode analysis is adopted and closed-form expressions are derived to describe the filter's behaviour. To verify the validity of the proposed design, a prototype filter was fabricated and measured. In measurement, a 65% 3-dB bandwidth bandpass filter (BPF) with an insertion loss of 0.86 dB was switched to a 70% 20-dB bandwidth bandstop filter (BSF) with more than 40 dB stopband rejection.https://ieeexplore.ieee.org/document/9335968/Bandpass filter (BPF)bandstop filter (BSF)PIN diodesring resonatorsingle-pole-double-throw (SPDT) |
| spellingShingle | Salman Arain Photos Vryonides Kashif Nisar Abdul Quddious Symeon Nikolaou Novel Selective Feeding Scheme Integrated With SPDT Switches for a Reconfigurable Bandpass-to-Bandstop Filter IEEE Access Bandpass filter (BPF) bandstop filter (BSF) PIN diodes ring resonator single-pole-double-throw (SPDT) |
| title | Novel Selective Feeding Scheme Integrated With SPDT Switches for a Reconfigurable Bandpass-to-Bandstop Filter |
| title_full | Novel Selective Feeding Scheme Integrated With SPDT Switches for a Reconfigurable Bandpass-to-Bandstop Filter |
| title_fullStr | Novel Selective Feeding Scheme Integrated With SPDT Switches for a Reconfigurable Bandpass-to-Bandstop Filter |
| title_full_unstemmed | Novel Selective Feeding Scheme Integrated With SPDT Switches for a Reconfigurable Bandpass-to-Bandstop Filter |
| title_short | Novel Selective Feeding Scheme Integrated With SPDT Switches for a Reconfigurable Bandpass-to-Bandstop Filter |
| title_sort | novel selective feeding scheme integrated with spdt switches for a reconfigurable bandpass to bandstop filter |
| topic | Bandpass filter (BPF) bandstop filter (BSF) PIN diodes ring resonator single-pole-double-throw (SPDT) |
| url | https://ieeexplore.ieee.org/document/9335968/ |
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