Metasurface‐based circularly polarised antenna: Enhanced bandwidth with characteristic mode analysis and symmetric branch design
Abstract A low‐profile circularly polarised (CP) metasurface antenna is proposed, utilising characteristic mode analysis (CMA). The antenna design features a two‐layer laminated substrate, a 4×4 Butterfly‐shaped metasurface, a rectangular slot, an irregular transmission line, and a ground plane. The...
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| Format: | Article |
| Language: | English |
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Wiley
2024-12-01
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| Series: | IET Microwaves, Antennas & Propagation |
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| Online Access: | https://doi.org/10.1049/mia2.12516 |
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| author | Yan Wang Zhendong Ding Junrui Yu Jianyin Cao Hao Wang Michael Yan‐Wah Chia Nasimuddin Nasimuddin |
| author_facet | Yan Wang Zhendong Ding Junrui Yu Jianyin Cao Hao Wang Michael Yan‐Wah Chia Nasimuddin Nasimuddin |
| author_sort | Yan Wang |
| collection | DOAJ |
| description | Abstract A low‐profile circularly polarised (CP) metasurface antenna is proposed, utilising characteristic mode analysis (CMA). The antenna design features a two‐layer laminated substrate, a 4×4 Butterfly‐shaped metasurface, a rectangular slot, an irregular transmission line, and a ground plane. The metasurface is analysed using mode significance (MS), characteristic angle (CA), and characteristic current to determine the resonance bandwidth and CA resonance points, which exhibit a near 90° difference. At the intersection of the two MS modes, their CAs differ by nearly 90°, and their far‐field radiation directions align, indicating the potential for achieving circular polarisation at the desired frequency. The integration of the metasurface with the slot antenna is simulated to validate the CMA findings. Additionally, the CP bandwidth is enhanced by modifying the transmission line branches. Measurement of the fabricated antenna reveals an impedance bandwidth (IBW) of 27.4%, a 3‐dB axial ratio bandwidth (ARBW) of 10.1%, and a peak gain of 6.9 dBic at 4.4 GHz. Compared to the design without branches, IBW and ARBW have increased by 10% and 7.3%, respectively. |
| format | Article |
| id | doaj-art-51679d568d6d490bb8131b6ca4c96b8d |
| institution | Kabale University |
| issn | 1751-8725 1751-8733 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Microwaves, Antennas & Propagation |
| spelling | doaj-art-51679d568d6d490bb8131b6ca4c96b8d2024-12-23T18:53:51ZengWileyIET Microwaves, Antennas & Propagation1751-87251751-87332024-12-01181297498410.1049/mia2.12516Metasurface‐based circularly polarised antenna: Enhanced bandwidth with characteristic mode analysis and symmetric branch designYan Wang0Zhendong Ding1Junrui Yu2Jianyin Cao3Hao Wang4Michael Yan‐Wah Chia5Nasimuddin Nasimuddin6School of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing ChinaSchool of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing ChinaSchool of Electrical and Electronic Engineering Nanyang Technological University Singapore SingaporeSchool of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing ChinaSchool of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing ChinaInstitute for Infocomm Research Singapore SingaporeInstitute for Infocomm Research Singapore SingaporeAbstract A low‐profile circularly polarised (CP) metasurface antenna is proposed, utilising characteristic mode analysis (CMA). The antenna design features a two‐layer laminated substrate, a 4×4 Butterfly‐shaped metasurface, a rectangular slot, an irregular transmission line, and a ground plane. The metasurface is analysed using mode significance (MS), characteristic angle (CA), and characteristic current to determine the resonance bandwidth and CA resonance points, which exhibit a near 90° difference. At the intersection of the two MS modes, their CAs differ by nearly 90°, and their far‐field radiation directions align, indicating the potential for achieving circular polarisation at the desired frequency. The integration of the metasurface with the slot antenna is simulated to validate the CMA findings. Additionally, the CP bandwidth is enhanced by modifying the transmission line branches. Measurement of the fabricated antenna reveals an impedance bandwidth (IBW) of 27.4%, a 3‐dB axial ratio bandwidth (ARBW) of 10.1%, and a peak gain of 6.9 dBic at 4.4 GHz. Compared to the design without branches, IBW and ARBW have increased by 10% and 7.3%, respectively.https://doi.org/10.1049/mia2.12516antenna theoryantennasmicrowave metamaterials |
| spellingShingle | Yan Wang Zhendong Ding Junrui Yu Jianyin Cao Hao Wang Michael Yan‐Wah Chia Nasimuddin Nasimuddin Metasurface‐based circularly polarised antenna: Enhanced bandwidth with characteristic mode analysis and symmetric branch design IET Microwaves, Antennas & Propagation antenna theory antennas microwave metamaterials |
| title | Metasurface‐based circularly polarised antenna: Enhanced bandwidth with characteristic mode analysis and symmetric branch design |
| title_full | Metasurface‐based circularly polarised antenna: Enhanced bandwidth with characteristic mode analysis and symmetric branch design |
| title_fullStr | Metasurface‐based circularly polarised antenna: Enhanced bandwidth with characteristic mode analysis and symmetric branch design |
| title_full_unstemmed | Metasurface‐based circularly polarised antenna: Enhanced bandwidth with characteristic mode analysis and symmetric branch design |
| title_short | Metasurface‐based circularly polarised antenna: Enhanced bandwidth with characteristic mode analysis and symmetric branch design |
| title_sort | metasurface based circularly polarised antenna enhanced bandwidth with characteristic mode analysis and symmetric branch design |
| topic | antenna theory antennas microwave metamaterials |
| url | https://doi.org/10.1049/mia2.12516 |
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