{"title":"A Compact Broadband Circularly Polarized Metasurface Antenna","authors":"Liping Han, Xiaofang Chen, Guorui Han, Yufeng Liu, Yajuan Zhao, Wenmei Zhang, Member, IEEE","doi":"10.1002/mop.70347","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>This letter demonstrates a design method of wide circularly polarized (CP) antennas by combining two separated characteristic modes of metasurface and the resonant mode of the feeding structure. The modal bandwidth of the metasurface is extended through separating a pair of degenerate modes of a metasurface, and two separated characteristic modes are selected as the candidate modes. A slot-coupled feeding structure with a 90° phase difference is employed to excite the metasurface, and then a wider axial ratio bandwidth (ARBW) can be attained by assembling the resonant modes of the metasurface and the feeding structure. The dimension of the proposed antenna is 0.93<i>λ</i><sub>0</sub> × 0.93<i>λ</i><sub>0</sub> × 0.067<i>λ</i><sub>0</sub>. The measurements indicate that the antenna achieves a −10-dB impedance bandwidth of 3.98–6.36 GHz (46%), a 3-dB ARBW of 4.3–6.3 GHz (37.7%), and a maximum realized gain of 6.24 dBi.</p>\n </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 8","pages":""},"PeriodicalIF":1.2000,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microwave and Optical Technology Letters","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/mop.70347","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
This letter demonstrates a design method of wide circularly polarized (CP) antennas by combining two separated characteristic modes of metasurface and the resonant mode of the feeding structure. The modal bandwidth of the metasurface is extended through separating a pair of degenerate modes of a metasurface, and two separated characteristic modes are selected as the candidate modes. A slot-coupled feeding structure with a 90° phase difference is employed to excite the metasurface, and then a wider axial ratio bandwidth (ARBW) can be attained by assembling the resonant modes of the metasurface and the feeding structure. The dimension of the proposed antenna is 0.93λ0 × 0.93λ0 × 0.067λ0. The measurements indicate that the antenna achieves a −10-dB impedance bandwidth of 3.98–6.36 GHz (46%), a 3-dB ARBW of 4.3–6.3 GHz (37.7%), and a maximum realized gain of 6.24 dBi.
期刊介绍：
Microwave and Optical Technology Letters provides quick publication (3 to 6 month turnaround) of the most recent findings and achievements in high frequency technology, from RF to optical spectrum. The journal publishes original short papers and letters on theoretical, applied, and system results in the following areas.
- RF, Microwave, and Millimeter Waves
- Antennas and Propagation
- Submillimeter-Wave and Infrared Technology
- Optical Engineering
All papers are subject to peer review before publication
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