Simulation-Based Approach to the Matching of a Dielectric-Filled Circular Waveguide Aperture
The circular waveguide aperture or open-end radiator, one of the canonical antenna elements, can be filled with a dielectric material for miniaturization. With dielectric filling, the aperture reflection increases and impedance matching is necessary. This paper presents a simple but innovative simul...
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| Format: | Article |
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MDPI AG
2024-01-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/24/3/841 |
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| author | Songyuan Xu Jiwon Heo Byoung-Kwon Ahn Chan-Soo Lee Bierng-Chearl Ahn |
| author_facet | Songyuan Xu Jiwon Heo Byoung-Kwon Ahn Chan-Soo Lee Bierng-Chearl Ahn |
| author_sort | Songyuan Xu |
| collection | DOAJ |
| description | The circular waveguide aperture or open-end radiator, one of the canonical antenna elements, can be filled with a dielectric material for miniaturization. With dielectric filling, the aperture reflection increases and impedance matching is necessary. This paper presents a simple but innovative simulation-based approach to the aperture matching of a dielectric-filled circular waveguide aperture. By properly loading the aperture with two- or three-section dielectric rings, the impedance matching is possible over a wide frequency range starting slightly above the TE<sub>11</sub>-mode cutoff and continuing upward. The material for the aperture matching is the same as that filling the waveguide. The proposed matching structure is analyzed and optimized using a simulation tool for the dielectric constant <i>ε<sub>r</sub></i> of the filling material ranging from 1.8 to 10. For <i>ε<sub>r</sub></i> ≥ 5, the unmatched reflection coefficient ranges from −6.0 dB to −0.9 dB while the matched reflection coefficient is from −20.4 dB to −10.0 dB. The impedance matching has been achieved over more than an octave bandwidth. |
| first_indexed | 2024-03-08T03:48:42Z |
| format | Article |
| id | doaj.art-4d10ad7acdc540f8b69fab8f241506c9 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-08T03:48:42Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-4d10ad7acdc540f8b69fab8f241506c92024-02-09T15:22:00ZengMDPI AGSensors1424-82202024-01-0124384110.3390/s24030841Simulation-Based Approach to the Matching of a Dielectric-Filled Circular Waveguide ApertureSongyuan Xu0Jiwon Heo1Byoung-Kwon Ahn2Chan-Soo Lee3Bierng-Chearl Ahn4School of Electric and Computer Engineering, Chungbuk National University, Cheongju 28644, Republic of KoreaSchool of Electric and Computer Engineering, Chungbuk National University, Cheongju 28644, Republic of KoreaSchool of Autonomous Vehicle System Engineering, Chungnam National University, Yuseong-gu, Daejeon 34134, Republic of KoreaSchool of Electric and Computer Engineering, Chungbuk National University, Cheongju 28644, Republic of KoreaSchool of Electric and Computer Engineering, Chungbuk National University, Cheongju 28644, Republic of KoreaThe circular waveguide aperture or open-end radiator, one of the canonical antenna elements, can be filled with a dielectric material for miniaturization. With dielectric filling, the aperture reflection increases and impedance matching is necessary. This paper presents a simple but innovative simulation-based approach to the aperture matching of a dielectric-filled circular waveguide aperture. By properly loading the aperture with two- or three-section dielectric rings, the impedance matching is possible over a wide frequency range starting slightly above the TE<sub>11</sub>-mode cutoff and continuing upward. The material for the aperture matching is the same as that filling the waveguide. The proposed matching structure is analyzed and optimized using a simulation tool for the dielectric constant <i>ε<sub>r</sub></i> of the filling material ranging from 1.8 to 10. For <i>ε<sub>r</sub></i> ≥ 5, the unmatched reflection coefficient ranges from −6.0 dB to −0.9 dB while the matched reflection coefficient is from −20.4 dB to −10.0 dB. The impedance matching has been achieved over more than an octave bandwidth.https://www.mdpi.com/1424-8220/24/3/841impedance matchingwaveguide aperturedielectric filledopen-end radiator |
| spellingShingle | Songyuan Xu Jiwon Heo Byoung-Kwon Ahn Chan-Soo Lee Bierng-Chearl Ahn Simulation-Based Approach to the Matching of a Dielectric-Filled Circular Waveguide Aperture Sensors impedance matching waveguide aperture dielectric filled open-end radiator |
| title | Simulation-Based Approach to the Matching of a Dielectric-Filled Circular Waveguide Aperture |
| title_full | Simulation-Based Approach to the Matching of a Dielectric-Filled Circular Waveguide Aperture |
| title_fullStr | Simulation-Based Approach to the Matching of a Dielectric-Filled Circular Waveguide Aperture |
| title_full_unstemmed | Simulation-Based Approach to the Matching of a Dielectric-Filled Circular Waveguide Aperture |
| title_short | Simulation-Based Approach to the Matching of a Dielectric-Filled Circular Waveguide Aperture |
| title_sort | simulation based approach to the matching of a dielectric filled circular waveguide aperture |
| topic | impedance matching waveguide aperture dielectric filled open-end radiator |
| url | https://www.mdpi.com/1424-8220/24/3/841 |
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