{"title":"Grating Lobe Suppression in Lens Loaded Circularly Polarized Phased Array with One Wavelength Element Spacing","authors":"Zhicheng Huang, S. Liao, W. Che, Q. Xue","doi":"10.1109/IWS55252.2022.9977808","DOIUrl":null,"url":null,"abstract":"This paper presents a low grating lobe lens loaded circularly polarized phased array with one wavelength element spacing at 28GHz band. The 2×2-element slot-coupled corner-truncated patch antenna is fed through a sequential feeding network, which, as a subarray, further forms a 4×4 phased array. A lens is placed above each patch sub array to suppress the grating lobe during the angle scanning. The results show that within ±15° scanning angle, the difference between the main lobe and the grating lobe remains below -11 dB within 25-31GHz. Besides, at broadside, the 3-dB axial ratio bandwidth is 21.4% and the aperture efficiency is above 60% in 19.9% bandwidth.","PeriodicalId":126964,"journal":{"name":"2022 IEEE MTT-S International Wireless Symposium (IWS)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2022-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2022 IEEE MTT-S International Wireless Symposium (IWS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IWS55252.2022.9977808","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
This paper presents a low grating lobe lens loaded circularly polarized phased array with one wavelength element spacing at 28GHz band. The 2×2-element slot-coupled corner-truncated patch antenna is fed through a sequential feeding network, which, as a subarray, further forms a 4×4 phased array. A lens is placed above each patch sub array to suppress the grating lobe during the angle scanning. The results show that within ±15° scanning angle, the difference between the main lobe and the grating lobe remains below -11 dB within 25-31GHz. Besides, at broadside, the 3-dB axial ratio bandwidth is 21.4% and the aperture efficiency is above 60% in 19.9% bandwidth.
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