A <i>TM</i><sub>01</sub>-<i>TE</i><sub>11</sub> Circular Waveguide Mode Converter on the Basis of Dielectric Filling
In this paper, a dielectric-filled circular waveguide <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mi>T</mi><mi>M</mi></mrow><mrow><mn>...
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2025-05-01
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| author | Zibin Weng Ziming Lv Liupeng Zan Sihan Xiao Chen Liang |
| author_facet | Zibin Weng Ziming Lv Liupeng Zan Sihan Xiao Chen Liang |
| author_sort | Zibin Weng |
| collection | DOAJ |
| description | In this paper, a dielectric-filled circular waveguide <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mi>T</mi><mi>M</mi></mrow><mrow><mn>01</mn></mrow></msub></mrow></semantics></math></inline-formula><i>-</i><inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mi>T</mi><mi>E</mi></mrow><mrow><mn>11</mn></mrow></msub></mrow></semantics></math></inline-formula> mode converter is proposed, which has high conversion efficiency and a wide operating bandwidth. Filling the circular waveguide with dielectric material changes the local propagation characteristics, thus achieving a phase difference between the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mi>T</mi><mi>E</mi></mrow><mrow><mn>11</mn></mrow></msub></mrow></semantics></math></inline-formula> modes in the two halves of the circular waveguide during propagation. This, in turn, facilitates the completion of mode conversion with high efficiency. Compared with the conventional radial dielectric plate, this paper improves the method of filling the dielectric inside the circular waveguide by transforming it into a coaxial structure. This is followed by the incorporation of a radial dielectric plate, a modification that has been proven to enhance the conversion efficiency and extend the operational bandwidth. The mode converter operates at 9.7 GHz, and when the dielectric filler material is polytetrafluoroethylene (PTFE), both simulation and practical studies are carried out. The simulation results demonstrate that the maximum conversion efficiency of this mode converter is 99.2%, and the bandwidth with conversion efficiency greater than 90% is nearly 21.1%. The maximum conversion efficiency in the actual test is essentially consistent with the simulation results. The validity of the design scheme of this converter and the accuracy of the simulation study are demonstrated. |
| format | Article |
| id | doaj-art-aaea8e4f79314e36a095484bd1e6d572 |
| institution | Kabale University |
| issn | 2072-666X |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj-art-aaea8e4f79314e36a095484bd1e6d5722025-08-20T03:47:57ZengMDPI AGMicromachines2072-666X2025-05-0116558510.3390/mi16050585A <i>TM</i><sub>01</sub>-<i>TE</i><sub>11</sub> Circular Waveguide Mode Converter on the Basis of Dielectric FillingZibin Weng0Ziming Lv1Liupeng Zan2Sihan Xiao3Chen Liang4The National Key Laboratory of Radar Detection and Sensing, Xidian University, Xi’an 710071, ChinaThe National Key Laboratory of Radar Detection and Sensing, Xidian University, Xi’an 710071, ChinaThe National Key Laboratory of Radar Detection and Sensing, Xidian University, Xi’an 710071, ChinaThe National Key Laboratory of Radar Detection and Sensing, Xidian University, Xi’an 710071, ChinaThe National Key Laboratory of Radar Detection and Sensing, Xidian University, Xi’an 710071, ChinaIn this paper, a dielectric-filled circular waveguide <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mi>T</mi><mi>M</mi></mrow><mrow><mn>01</mn></mrow></msub></mrow></semantics></math></inline-formula><i>-</i><inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mi>T</mi><mi>E</mi></mrow><mrow><mn>11</mn></mrow></msub></mrow></semantics></math></inline-formula> mode converter is proposed, which has high conversion efficiency and a wide operating bandwidth. Filling the circular waveguide with dielectric material changes the local propagation characteristics, thus achieving a phase difference between the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mi>T</mi><mi>E</mi></mrow><mrow><mn>11</mn></mrow></msub></mrow></semantics></math></inline-formula> modes in the two halves of the circular waveguide during propagation. This, in turn, facilitates the completion of mode conversion with high efficiency. Compared with the conventional radial dielectric plate, this paper improves the method of filling the dielectric inside the circular waveguide by transforming it into a coaxial structure. This is followed by the incorporation of a radial dielectric plate, a modification that has been proven to enhance the conversion efficiency and extend the operational bandwidth. The mode converter operates at 9.7 GHz, and when the dielectric filler material is polytetrafluoroethylene (PTFE), both simulation and practical studies are carried out. The simulation results demonstrate that the maximum conversion efficiency of this mode converter is 99.2%, and the bandwidth with conversion efficiency greater than 90% is nearly 21.1%. The maximum conversion efficiency in the actual test is essentially consistent with the simulation results. The validity of the design scheme of this converter and the accuracy of the simulation study are demonstrated.https://www.mdpi.com/2072-666X/16/5/585media filling<i>TM</i><sub>01</sub>-<i>TE</i><sub>11</sub>mode conversioncircular waveguidewaveguide mode matchinghigh efficiency |
| spellingShingle | Zibin Weng Ziming Lv Liupeng Zan Sihan Xiao Chen Liang A <i>TM</i><sub>01</sub>-<i>TE</i><sub>11</sub> Circular Waveguide Mode Converter on the Basis of Dielectric Filling Micromachines media filling <i>TM</i><sub>01</sub>-<i>TE</i><sub>11</sub> mode conversion circular waveguide waveguide mode matching high efficiency |
| title | A <i>TM</i><sub>01</sub>-<i>TE</i><sub>11</sub> Circular Waveguide Mode Converter on the Basis of Dielectric Filling |
| title_full | A <i>TM</i><sub>01</sub>-<i>TE</i><sub>11</sub> Circular Waveguide Mode Converter on the Basis of Dielectric Filling |
| title_fullStr | A <i>TM</i><sub>01</sub>-<i>TE</i><sub>11</sub> Circular Waveguide Mode Converter on the Basis of Dielectric Filling |
| title_full_unstemmed | A <i>TM</i><sub>01</sub>-<i>TE</i><sub>11</sub> Circular Waveguide Mode Converter on the Basis of Dielectric Filling |
| title_short | A <i>TM</i><sub>01</sub>-<i>TE</i><sub>11</sub> Circular Waveguide Mode Converter on the Basis of Dielectric Filling |
| title_sort | i tm i sub 01 sub i te i sub 11 sub circular waveguide mode converter on the basis of dielectric filling |
| topic | media filling <i>TM</i><sub>01</sub>-<i>TE</i><sub>11</sub> mode conversion circular waveguide waveguide mode matching high efficiency |
| url | https://www.mdpi.com/2072-666X/16/5/585 |
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