{"title":"A Non-Uniform Metasurface-Based Wideband CP Antenna With Additional Filtering Response","authors":"Jiayan Zhang, H. Jin, Wenlei Wang, G. Luo","doi":"10.1109/APCAP56600.2022.10068784","DOIUrl":null,"url":null,"abstract":"A low-profile circular-polarized (CP) metasurface antenna (MSA) with wide axial ratio (AR) bandwidth and additional filtering response is presented. The proposed MSA consists of an array of $4\\times 4$ non-uniform corner-truncated patch units, and is excited by a filtering balun through two parallel coupling slots. An additional AR minimum can be produced by the non-uniform units resulting an improved AR bandwidth. The filtering balun with extra resonant stubs can produce three radiation nulls to form a bandpass filtering response. Simulated results indicate that the proposed filtering CP MSA has a fractional bandwidth of 17.7% for $\\vert \\boldsymbol{S}_{11}\\vert < -10\\text{dB}$ and AR < 3 dB, which can cover the 5G N79 band (4.4 - 5 GHz). Good bandpass filtering response with a flat in-band gain variation from 7.9 to 8.9 dBic and high out-of-band rejection levels of 31 and 27 dB in the lower and upper stopbands, respectively, are also observed.","PeriodicalId":197691,"journal":{"name":"2022 IEEE 10th Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2022-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2022 IEEE 10th Asia-Pacific Conference on Antennas and Propagation (APCAP)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/APCAP56600.2022.10068784","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
A low-profile circular-polarized (CP) metasurface antenna (MSA) with wide axial ratio (AR) bandwidth and additional filtering response is presented. The proposed MSA consists of an array of $4\times 4$ non-uniform corner-truncated patch units, and is excited by a filtering balun through two parallel coupling slots. An additional AR minimum can be produced by the non-uniform units resulting an improved AR bandwidth. The filtering balun with extra resonant stubs can produce three radiation nulls to form a bandpass filtering response. Simulated results indicate that the proposed filtering CP MSA has a fractional bandwidth of 17.7% for $\vert \boldsymbol{S}_{11}\vert < -10\text{dB}$ and AR < 3 dB, which can cover the 5G N79 band (4.4 - 5 GHz). Good bandpass filtering response with a flat in-band gain variation from 7.9 to 8.9 dBic and high out-of-band rejection levels of 31 and 27 dB in the lower and upper stopbands, respectively, are also observed.