A Compact Microwave Quadrature Hybrid Coupler Using Capacitive Composite Lines and Meandered Stubs
In this paper, a new structure of the quadrature hybrid coupler (QHC) with compact size is proposed using capacitive composite lines and meandered open stubs. The proposed coupler works at 1.6 GHz with a 0.4 GHz bandwidth, which shows 25% fractional bandwidth (FBW). The proposed QHC occupies only 15...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-12-01
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| Series: | Symmetry |
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| Online Access: | https://www.mdpi.com/2073-8994/15/12/2149 |
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| author | Sobhan Roshani Salah I. Yahya Maher Assaad Muhammad Akmal Chaudhary Fawwaz Hazzazi Yazeed Yasin Ghadi Sarmad M. Ali Saeed Roshani |
| author_facet | Sobhan Roshani Salah I. Yahya Maher Assaad Muhammad Akmal Chaudhary Fawwaz Hazzazi Yazeed Yasin Ghadi Sarmad M. Ali Saeed Roshani |
| author_sort | Sobhan Roshani |
| collection | DOAJ |
| description | In this paper, a new structure of the quadrature hybrid coupler (QHC) with compact size is proposed using capacitive composite lines and meandered open stubs. The proposed coupler works at 1.6 GHz with a 0.4 GHz bandwidth, which shows 25% fractional bandwidth (FBW). The proposed QHC occupies only 15 mm × 15 mm (0.12 λ × 0.12 λ), while the typical QHC size is 32 mm × 32 mm (0.25 λ × 25 λ) at the same working frequency. In the designed structure, two symmetric meandered stubs and two symmetric π-shaped composite networks including capacitors and microstrip lines are applied together. The designed QHC has a small size and occupies only 22% of the area of the conventional QHC, resulting in a 78% size reduction. The designed prototype has been analyzed, fabricated and tested, and the experimental results verify the simulated and analysis results. The results show a better than 27 dB return loss, more than 28 dB isolation between the output ports and less than 0.4 dB insertion loss at the working frequency of 1600 MHz. With the achieved desirable specifications, the fabricated QHC is a suitable choice for wireless microwave applications. |
| first_indexed | 2024-03-08T20:20:17Z |
| format | Article |
| id | doaj.art-abdb0d5205e14d84b80442bc3c4d82e2 |
| institution | Directory Open Access Journal |
| issn | 2073-8994 |
| language | English |
| last_indexed | 2024-03-08T20:20:17Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Symmetry |
| spelling | doaj.art-abdb0d5205e14d84b80442bc3c4d82e22023-12-22T14:45:11ZengMDPI AGSymmetry2073-89942023-12-011512214910.3390/sym15122149A Compact Microwave Quadrature Hybrid Coupler Using Capacitive Composite Lines and Meandered StubsSobhan Roshani0Salah I. Yahya1Maher Assaad2Muhammad Akmal Chaudhary3Fawwaz Hazzazi4Yazeed Yasin Ghadi5Sarmad M. Ali6Saeed Roshani7Department of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah 6718997551, IranDepartment of Communication and Computer Engineering, Cihan University-Erbil, Erbil 44001, IraqDepartment of Electrical and Computer Engineering, College of Engineering and Information Technology, Ajman University, Ajman 346, United Arab EmiratesDepartment of Electrical and Computer Engineering, College of Engineering and Information Technology, Ajman University, Ajman 346, United Arab EmiratesDepartment of Electrical Engineering, College of Engineering in Al-Kharj, Prince Sattam bin Abdulaziz University, Al Kharj 11492, Saudi ArabiaSoftware Engineering and Computer Science Department, Al Ain University, Al Ain P.O. Box 15551, United Arab EmiratesDepartment of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah 6718997551, IranDepartment of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah 6718997551, IranIn this paper, a new structure of the quadrature hybrid coupler (QHC) with compact size is proposed using capacitive composite lines and meandered open stubs. The proposed coupler works at 1.6 GHz with a 0.4 GHz bandwidth, which shows 25% fractional bandwidth (FBW). The proposed QHC occupies only 15 mm × 15 mm (0.12 λ × 0.12 λ), while the typical QHC size is 32 mm × 32 mm (0.25 λ × 25 λ) at the same working frequency. In the designed structure, two symmetric meandered stubs and two symmetric π-shaped composite networks including capacitors and microstrip lines are applied together. The designed QHC has a small size and occupies only 22% of the area of the conventional QHC, resulting in a 78% size reduction. The designed prototype has been analyzed, fabricated and tested, and the experimental results verify the simulated and analysis results. The results show a better than 27 dB return loss, more than 28 dB isolation between the output ports and less than 0.4 dB insertion loss at the working frequency of 1600 MHz. With the achieved desirable specifications, the fabricated QHC is a suitable choice for wireless microwave applications.https://www.mdpi.com/2073-8994/15/12/2149quadrature hybrid couplercompact sizelumped capacitorscommunication systems |
| spellingShingle | Sobhan Roshani Salah I. Yahya Maher Assaad Muhammad Akmal Chaudhary Fawwaz Hazzazi Yazeed Yasin Ghadi Sarmad M. Ali Saeed Roshani A Compact Microwave Quadrature Hybrid Coupler Using Capacitive Composite Lines and Meandered Stubs Symmetry quadrature hybrid coupler compact size lumped capacitors communication systems |
| title | A Compact Microwave Quadrature Hybrid Coupler Using Capacitive Composite Lines and Meandered Stubs |
| title_full | A Compact Microwave Quadrature Hybrid Coupler Using Capacitive Composite Lines and Meandered Stubs |
| title_fullStr | A Compact Microwave Quadrature Hybrid Coupler Using Capacitive Composite Lines and Meandered Stubs |
| title_full_unstemmed | A Compact Microwave Quadrature Hybrid Coupler Using Capacitive Composite Lines and Meandered Stubs |
| title_short | A Compact Microwave Quadrature Hybrid Coupler Using Capacitive Composite Lines and Meandered Stubs |
| title_sort | compact microwave quadrature hybrid coupler using capacitive composite lines and meandered stubs |
| topic | quadrature hybrid coupler compact size lumped capacitors communication systems |
| url | https://www.mdpi.com/2073-8994/15/12/2149 |
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