Compact and Wide-Stopband Bandpass Filter Using Hybrid Shielded EMCSIW and CSRR Resonators with a Mixed Electromagnetic Coupling Scheme
This paper presents a bandpass filter (BPF) exploiting hybrid shielded eighth-mode circular substrate-integrated waveguide (SD-EMCSIW) and complementary split ring resonator (CSRR) resonators. The proposed BPF leverages the SD-EMCSIW resonator with a 45-degree angle to create a second-order BPF with...
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MDPI AG
2024-11-01
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| author | Zhuo-Wei Miao |
| author_facet | Zhuo-Wei Miao |
| author_sort | Zhuo-Wei Miao |
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| description | This paper presents a bandpass filter (BPF) exploiting hybrid shielded eighth-mode circular substrate-integrated waveguide (SD-EMCSIW) and complementary split ring resonator (CSRR) resonators. The proposed BPF leverages the SD-EMCSIW resonator with a 45-degree angle to create a second-order BPF with a mixed electromagnetic coupling scheme. Detailed analyses of the related electromagnetic characteristics and operating mechanisms have been performed. In order to further reduce the occupied area, the CSRR structures are embedded into the SD-EMCSIW resonators. Meanwhile, extra metallic via-holes are implemented to enhance the upper-stopband performance. A transmission zero (TZ) of the second-order BPF can be placed on either the left or right side of the passband and can be flexibly adjusted. To validate the design concept, a second-order hybrid SD-EMCSIW and CSRR BPF was designed, simulated, fabricated, and measured as a specific example. The prototype operates at a center frequency <i>f</i><sub>0</sub> of 8.3 GHz with a 3 dB fractional bandwidth of 8.1%. Two transmission zeros are located near the right passband. The upper-stopband rejection reaches up to 15 dB at 2.85 times the center frequency <i>f</i><sub>0</sub>. Both the simulated and measured results show satisfactory agreement. Meanwhile, the overall size of the proposed hybrid SD-EMCSIW and CSRR BPF is 13.5 mm × 13.0 mm (0.37<i>λ</i><sub>0</sub> × 0.36<i>λ</i><sub>0</sub>), featuring a compact physical dimension in the filter design. |
| format | Article |
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| institution | DOAJ |
| issn | 2072-666X |
| language | English |
| publishDate | 2024-11-01 |
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| spelling | doaj-art-cbe11196e6d34099b75608926bc940e22025-08-20T02:39:41ZengMDPI AGMicromachines2072-666X2024-11-011512142610.3390/mi15121426Compact and Wide-Stopband Bandpass Filter Using Hybrid Shielded EMCSIW and CSRR Resonators with a Mixed Electromagnetic Coupling SchemeZhuo-Wei Miao0State Key Laboratory of Millimeter-Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, ChinaThis paper presents a bandpass filter (BPF) exploiting hybrid shielded eighth-mode circular substrate-integrated waveguide (SD-EMCSIW) and complementary split ring resonator (CSRR) resonators. The proposed BPF leverages the SD-EMCSIW resonator with a 45-degree angle to create a second-order BPF with a mixed electromagnetic coupling scheme. Detailed analyses of the related electromagnetic characteristics and operating mechanisms have been performed. In order to further reduce the occupied area, the CSRR structures are embedded into the SD-EMCSIW resonators. Meanwhile, extra metallic via-holes are implemented to enhance the upper-stopband performance. A transmission zero (TZ) of the second-order BPF can be placed on either the left or right side of the passband and can be flexibly adjusted. To validate the design concept, a second-order hybrid SD-EMCSIW and CSRR BPF was designed, simulated, fabricated, and measured as a specific example. The prototype operates at a center frequency <i>f</i><sub>0</sub> of 8.3 GHz with a 3 dB fractional bandwidth of 8.1%. Two transmission zeros are located near the right passband. The upper-stopband rejection reaches up to 15 dB at 2.85 times the center frequency <i>f</i><sub>0</sub>. Both the simulated and measured results show satisfactory agreement. Meanwhile, the overall size of the proposed hybrid SD-EMCSIW and CSRR BPF is 13.5 mm × 13.0 mm (0.37<i>λ</i><sub>0</sub> × 0.36<i>λ</i><sub>0</sub>), featuring a compact physical dimension in the filter design.https://www.mdpi.com/2072-666X/15/12/1426bandpass filter (BPF)complementary split ring resonator (CSRR)shielded eighth-mode circular substrate-integrated waveguide (SD-EMCSIW)mixed coupling |
| spellingShingle | Zhuo-Wei Miao Compact and Wide-Stopband Bandpass Filter Using Hybrid Shielded EMCSIW and CSRR Resonators with a Mixed Electromagnetic Coupling Scheme Micromachines bandpass filter (BPF) complementary split ring resonator (CSRR) shielded eighth-mode circular substrate-integrated waveguide (SD-EMCSIW) mixed coupling |
| title | Compact and Wide-Stopband Bandpass Filter Using Hybrid Shielded EMCSIW and CSRR Resonators with a Mixed Electromagnetic Coupling Scheme |
| title_full | Compact and Wide-Stopband Bandpass Filter Using Hybrid Shielded EMCSIW and CSRR Resonators with a Mixed Electromagnetic Coupling Scheme |
| title_fullStr | Compact and Wide-Stopband Bandpass Filter Using Hybrid Shielded EMCSIW and CSRR Resonators with a Mixed Electromagnetic Coupling Scheme |
| title_full_unstemmed | Compact and Wide-Stopband Bandpass Filter Using Hybrid Shielded EMCSIW and CSRR Resonators with a Mixed Electromagnetic Coupling Scheme |
| title_short | Compact and Wide-Stopband Bandpass Filter Using Hybrid Shielded EMCSIW and CSRR Resonators with a Mixed Electromagnetic Coupling Scheme |
| title_sort | compact and wide stopband bandpass filter using hybrid shielded emcsiw and csrr resonators with a mixed electromagnetic coupling scheme |
| topic | bandpass filter (BPF) complementary split ring resonator (CSRR) shielded eighth-mode circular substrate-integrated waveguide (SD-EMCSIW) mixed coupling |
| url | https://www.mdpi.com/2072-666X/15/12/1426 |
| work_keys_str_mv | AT zhuoweimiao compactandwidestopbandbandpassfilterusinghybridshieldedemcsiwandcsrrresonatorswithamixedelectromagneticcouplingscheme |