{"title":"Bandwidth enhancement in Ka-Band circularly polarized reflectarray using stacked cross-bowtie elements","authors":"Muhammad M. Tahseen, A. Kishk","doi":"10.1109/ANTEM.2016.7550146","DOIUrl":null,"url":null,"abstract":"In this paper, stacked element technique has been employed to broaden the bandwidth (BW) for circularly polarized (CP) reflectarray in the Ka-Band. A wideband double layer λ/4 unit cell with cross-bowtie elements, has been proposed. The element rotation technique has been used to obtain the phase characteristics of the unit cell. A 25×25 reflectarray has been designed for the full-wave analysis that provides higher aperture efficiency and wider RA bandwidth. The proposed antenna provides, 1-dB gain bandwidth of 33 %, 3-dB axial ratio (AR) bandwidth of 53 %, SLL of -18 dB, and a maximum aperture efficiency of 58 % (at 30 GHz).","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ANTEM.2016.7550146","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 4
Abstract
In this paper, stacked element technique has been employed to broaden the bandwidth (BW) for circularly polarized (CP) reflectarray in the Ka-Band. A wideband double layer λ/4 unit cell with cross-bowtie elements, has been proposed. The element rotation technique has been used to obtain the phase characteristics of the unit cell. A 25×25 reflectarray has been designed for the full-wave analysis that provides higher aperture efficiency and wider RA bandwidth. The proposed antenna provides, 1-dB gain bandwidth of 33 %, 3-dB axial ratio (AR) bandwidth of 53 %, SLL of -18 dB, and a maximum aperture efficiency of 58 % (at 30 GHz).
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