Ze Yu;Chang Chen;Wei-Dong Chen;Xiang Zhang;Xiao-Lin Zhang
{"title":"A Novel Grating Lobe Suppression Method for Large-Spacing Phased Arrays Using Prephased Metalens and Limited Random Phase","authors":"Ze Yu;Chang Chen;Wei-Dong Chen;Xiang Zhang;Xiao-Lin Zhang","doi":"10.1109/LAWP.2024.3502788","DOIUrl":null,"url":null,"abstract":"The electronically steered phased array (ESPA), which is composed of periodic antenna elements, usually uses subarrays with large spacing to lower system complexity and cost. This kind of phased subarray (PSA) has a serious problem with grating lobes while beam scanning. A prephased metalens PSA (PMPSA) that combines prephases and metalens for modifying the transmitting phases is proposed. Further, the limited random phase method (LRPM) for randomizing the feeding phases and cooperating with prephased metalens to suppress the grating lobes is also proposed. In comparison to a PSA with the same parameters, the results demonstrate that the PMPSA can achieve a much better SLL, especially at wide scanning angles. Finally, calculated and simulated results show that a 16 × 16-unit phased array with 2 × 2-unit subarrays can achieve an SLL below −9.9 dB in 2D scanning using the limited random phase method.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 2","pages":"444-448"},"PeriodicalIF":4.8000,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Antennas and Wireless Propagation Letters","FirstCategoryId":"94","ListUrlMain":"https://ieeexplore.ieee.org/document/10758342/","RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
The electronically steered phased array (ESPA), which is composed of periodic antenna elements, usually uses subarrays with large spacing to lower system complexity and cost. This kind of phased subarray (PSA) has a serious problem with grating lobes while beam scanning. A prephased metalens PSA (PMPSA) that combines prephases and metalens for modifying the transmitting phases is proposed. Further, the limited random phase method (LRPM) for randomizing the feeding phases and cooperating with prephased metalens to suppress the grating lobes is also proposed. In comparison to a PSA with the same parameters, the results demonstrate that the PMPSA can achieve a much better SLL, especially at wide scanning angles. Finally, calculated and simulated results show that a 16 × 16-unit phased array with 2 × 2-unit subarrays can achieve an SLL below −9.9 dB in 2D scanning using the limited random phase method.
期刊介绍：
IEEE Antennas and Wireless Propagation Letters (AWP Letters) is devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation. These are areas of competence for the IEEE Antennas and Propagation Society (AP-S). AWPL aims to be one of the "fastest" journals among IEEE publications. This means that for papers that are eventually accepted, it is intended that an author may expect his or her paper to appear in IEEE Xplore, on average, around two months after submission.
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