Meiling Ou;Yiang Chen;Dagang Liu;Haiyang Wang;Tianming Li;Biao Hu;Cheng Zhang;Fadhel M. Ghannouchi;Hao Li
{"title":"基于非辐射介质波导的90°弯曲理论与实验研究","authors":"Meiling Ou;Yiang Chen;Dagang Liu;Haiyang Wang;Tianming Li;Biao Hu;Cheng Zhang;Fadhel M. Ghannouchi;Hao Li","doi":"10.1109/LMWT.2024.3523901","DOIUrl":null,"url":null,"abstract":"Nonradiative dielectric (NRD) waveguides are recognized as suitable transmission lines for millimeter-wave applications, as they are planarized and of low loss. However, since the mode with the lowest loss is not the mode with the lowest cutoff frequency, NRD waveguides are often used in an overmoded state. Many devices based on NRD that do not need to be deformed are designed and have achieved good results. Nevertheless, the physical mechanism underpinning the bending of NRD waveguides in the direction of propagation while maintaining an unchanged cross section has not been fully elucidated, due to the inapplicability of the original coupled-wave analysis method. In this letter, we focus on a 90° NRD bend and attempt to explain the mode coupling of NRD during the bending process. The bandwidth of the designed W-band NRD bend with a transmission efficiency greater than 95% is 5 GHz.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 6","pages":"634-637"},"PeriodicalIF":3.4000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Theoretical and Experimental Investigations of a 90° Bend Based on Nonradiative Dielectric Waveguide\",\"authors\":\"Meiling Ou;Yiang Chen;Dagang Liu;Haiyang Wang;Tianming Li;Biao Hu;Cheng Zhang;Fadhel M. Ghannouchi;Hao Li\",\"doi\":\"10.1109/LMWT.2024.3523901\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Nonradiative dielectric (NRD) waveguides are recognized as suitable transmission lines for millimeter-wave applications, as they are planarized and of low loss. However, since the mode with the lowest loss is not the mode with the lowest cutoff frequency, NRD waveguides are often used in an overmoded state. Many devices based on NRD that do not need to be deformed are designed and have achieved good results. Nevertheless, the physical mechanism underpinning the bending of NRD waveguides in the direction of propagation while maintaining an unchanged cross section has not been fully elucidated, due to the inapplicability of the original coupled-wave analysis method. In this letter, we focus on a 90° NRD bend and attempt to explain the mode coupling of NRD during the bending process. The bandwidth of the designed W-band NRD bend with a transmission efficiency greater than 95% is 5 GHz.\",\"PeriodicalId\":73297,\"journal\":{\"name\":\"IEEE microwave and wireless technology letters\",\"volume\":\"35 6\",\"pages\":\"634-637\"},\"PeriodicalIF\":3.4000,\"publicationDate\":\"2025-04-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE microwave and wireless technology letters\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://ieeexplore.ieee.org/document/10945550/\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"0\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE microwave and wireless technology letters","FirstCategoryId":"1085","ListUrlMain":"https://ieeexplore.ieee.org/document/10945550/","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"0","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
Theoretical and Experimental Investigations of a 90° Bend Based on Nonradiative Dielectric Waveguide
Nonradiative dielectric (NRD) waveguides are recognized as suitable transmission lines for millimeter-wave applications, as they are planarized and of low loss. However, since the mode with the lowest loss is not the mode with the lowest cutoff frequency, NRD waveguides are often used in an overmoded state. Many devices based on NRD that do not need to be deformed are designed and have achieved good results. Nevertheless, the physical mechanism underpinning the bending of NRD waveguides in the direction of propagation while maintaining an unchanged cross section has not been fully elucidated, due to the inapplicability of the original coupled-wave analysis method. In this letter, we focus on a 90° NRD bend and attempt to explain the mode coupling of NRD during the bending process. The bandwidth of the designed W-band NRD bend with a transmission efficiency greater than 95% is 5 GHz.