Extremely wideband ridge gap waveguide-based 3-dB coupler using supershaped coupling apertures
This paper introduces a novel broadband 3-dB coupler based on ridge gap waveguide (RGW) technology designed using supershapes to achieve exceptional bandwidth while maintaining a compact footprint. By leveraging the superformula—a parametric model capable of generating complex geometries with minima...
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| Vydáno v: | Scientific reports Ročník 15; číslo 1; s. 39275 - 17 |
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| Hlavní autoři: | , , , |
| Médium: | Journal Article |
| Jazyk: | angličtina |
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London
Nature Publishing Group UK
10.11.2025
Nature Publishing Group Nature Portfolio |
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| ISSN: | 2045-2322, 2045-2322 |
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| Abstract | This paper introduces a novel broadband 3-dB coupler based on ridge gap waveguide (RGW) technology designed using supershapes to achieve exceptional bandwidth while maintaining a compact footprint. By leveraging the superformula—a parametric model capable of generating complex geometries with minimal computational effort-the proposed design enables efficient exploration of a wide design space. Furthermore, to ensure efficient excitation of the coupler across the entire operational bandwidth two novel transitions from RGW to coaxial line and double-ridge waveguide are designed. The proposed coupler achieves a fractional bandwidth of 75.8% over the 18–40 GHz range (covering both K and Ka bands), featuring a return loss better than 18 dB, a coupling level of 3 ± 0.3 dB, isolation exceeding 22 dB, and a significantly compact footprint of 0.8λg—substantially smaller than conventional designs. Simulation and measurement results confirm the effectiveness of the proposed approach, demonstrating its suitability for high-performance broadband applications in microwave and millimeter-wave (mmWave) systems. |
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| AbstractList | This paper introduces a novel broadband 3-dB coupler based on ridge gap waveguide (RGW) technology designed using supershapes to achieve exceptional bandwidth while maintaining a compact footprint. By leveraging the superformula—a parametric model capable of generating complex geometries with minimal computational effort-the proposed design enables efficient exploration of a wide design space. Furthermore, to ensure efficient excitation of the coupler across the entire operational bandwidth two novel transitions from RGW to coaxial line and double-ridge waveguide are designed. The proposed coupler achieves a fractional bandwidth of 75.8% over the 18–40 GHz range (covering both K and Ka bands), featuring a return loss better than 18 dB, a coupling level of 3 ± 0.3 dB, isolation exceeding 22 dB, and a significantly compact footprint of 0.8λg—substantially smaller than conventional designs. Simulation and measurement results confirm the effectiveness of the proposed approach, demonstrating its suitability for high-performance broadband applications in microwave and millimeter-wave (mmWave) systems. Abstract This paper introduces a novel broadband 3-dB coupler based on ridge gap waveguide (RGW) technology designed using supershapes to achieve exceptional bandwidth while maintaining a compact footprint. By leveraging the superformula—a parametric model capable of generating complex geometries with minimal computational effort-the proposed design enables efficient exploration of a wide design space. Furthermore, to ensure efficient excitation of the coupler across the entire operational bandwidth two novel transitions from RGW to coaxial line and double-ridge waveguide are designed. The proposed coupler achieves a fractional bandwidth of 75.8% over the 18–40 GHz range (covering both K and Ka bands), featuring a return loss better than 18 dB, a coupling level of 3 ± 0.3 dB, isolation exceeding 22 dB, and a significantly compact footprint of 0.8λg—substantially smaller than conventional designs. Simulation and measurement results confirm the effectiveness of the proposed approach, demonstrating its suitability for high-performance broadband applications in microwave and millimeter-wave (mmWave) systems. This paper introduces a novel broadband 3-dB coupler based on ridge gap waveguide (RGW) technology designed using supershapes to achieve exceptional bandwidth while maintaining a compact footprint. By leveraging the superformula—a parametric model capable of generating complex geometries with minimal computational effort-the proposed design enables efficient exploration of a wide design space. Furthermore, to ensure efficient excitation of the coupler across the entire operational bandwidth two novel transitions from RGW to coaxial line and double-ridge waveguide are designed. The proposed coupler achieves a fractional bandwidth of 75.8% over the 18–40 GHz range (covering both K and Ka bands), featuring a return loss better than 18 dB, a coupling level of 3 ± 0.3 dB, isolation exceeding 22 dB, and a significantly compact footprint of 0.8λg—substantially smaller than conventional designs. Simulation and measurement results confirm the effectiveness of the proposed approach, demonstrating its suitability for high-performance broadband applications in microwave and millimeter-wave (mmWave) systems. This paper introduces a novel broadband 3-dB coupler based on ridge gap waveguide (RGW) technology designed using supershapes to achieve exceptional bandwidth while maintaining a compact footprint. By leveraging the superformula-a parametric model capable of generating complex geometries with minimal computational effort-the proposed design enables efficient exploration of a wide design space. Furthermore, to ensure efficient excitation of the coupler across the entire operational bandwidth two novel transitions from RGW to coaxial line and double-ridge waveguide are designed. The proposed coupler achieves a fractional bandwidth of 75.8% over the 18-40 GHz range (covering both K and Ka bands), featuring a return loss better than 18 dB, a coupling level of 3 ± 0.3 dB, isolation exceeding 22 dB, and a significantly compact footprint of 0.8λg-substantially smaller than conventional designs. Simulation and measurement results confirm the effectiveness of the proposed approach, demonstrating its suitability for high-performance broadband applications in microwave and millimeter-wave (mmWave) systems.This paper introduces a novel broadband 3-dB coupler based on ridge gap waveguide (RGW) technology designed using supershapes to achieve exceptional bandwidth while maintaining a compact footprint. By leveraging the superformula-a parametric model capable of generating complex geometries with minimal computational effort-the proposed design enables efficient exploration of a wide design space. Furthermore, to ensure efficient excitation of the coupler across the entire operational bandwidth two novel transitions from RGW to coaxial line and double-ridge waveguide are designed. The proposed coupler achieves a fractional bandwidth of 75.8% over the 18-40 GHz range (covering both K and Ka bands), featuring a return loss better than 18 dB, a coupling level of 3 ± 0.3 dB, isolation exceeding 22 dB, and a significantly compact footprint of 0.8λg-substantially smaller than conventional designs. Simulation and measurement results confirm the effectiveness of the proposed approach, demonstrating its suitability for high-performance broadband applications in microwave and millimeter-wave (mmWave) systems. |
| ArticleNumber | 39275 |
| Author | Farahbakhsh, Ali Mrozowski, Michal Zarifi, Davood Saber, Ali Sabbaghi |
| Author_xml | – sequence: 1 givenname: Davood surname: Zarifi fullname: Zarifi, Davood email: davood.zarifi@pg.edu.pl organization: Department of Microwave and Antenna Engineering, Faculty of Electronics, Telecommunications, and Informatics, Gdańsk University of Technology, School of Electrical and Computer Engineering, University of Kashan – sequence: 2 givenname: Ali Sabbaghi surname: Saber fullname: Saber, Ali Sabbaghi organization: School of Electrical and Computer Engineering, University of Kashan – sequence: 3 givenname: Ali surname: Farahbakhsh fullname: Farahbakhsh, Ali organization: Department of Microwave and Antenna Engineering, Faculty of Electronics, Telecommunications, and Informatics, Gdańsk University of Technology, Department of Electrical and Computer Engineering, Graduate University of Advanced Technology – sequence: 4 givenname: Michal surname: Mrozowski fullname: Mrozowski, Michal organization: Department of Microwave and Antenna Engineering, Faculty of Electronics, Telecommunications, and Informatics, Gdańsk University of Technology |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/41214200$$D View this record in MEDLINE/PubMed |
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| Snippet | This paper introduces a novel broadband 3-dB coupler based on ridge gap waveguide (RGW) technology designed using supershapes to achieve exceptional bandwidth... Abstract This paper introduces a novel broadband 3-dB coupler based on ridge gap waveguide (RGW) technology designed using supershapes to achieve exceptional... |
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| Title | Extremely wideband ridge gap waveguide-based 3-dB coupler using supershaped coupling apertures |
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