{"title":"Validation of a Low-Permittivity PCB Substrate for Compact 28-GHz Phased Array Antennas","authors":"Carrel da Gomez;Weichu Chen;Dongwon You;Xi Fu;Ibrahim Abdo;Shimpei Yakuwa;Naoki Nagaoka;Yasuto Ishimaru;Atsushi Shirane;Kenichi Okada","doi":"10.23919/comex.2025XBL0158","DOIUrl":null,"url":null,"abstract":"This letter presents the validation of a low-permittivity <tex>$(\\varepsilon_{r}= 1.88)$</tex> PCB substrate for compact, 28-GHz phased-array antennas. A grounded-coplanar-waveguide (CPWG) feed and a three-layer stack-up were verified using a TRL calibration board, confirming stable performance up to 60 GHz. A single via-fed patch antenna on the new laminate achieved 7.1 dBi gain, 3.2 dB higher than that on Megtron6 <tex>$(\\varepsilon_{r}=3.7)$</tex>. A <tex>$1\\times 4$</tex> array was implemented on the same stack-up achieved 9.2 dBi broadside gain and up to 0.8 dB lower scan loss at 60° compared with Megtron6. These results demonstrate the importance of substrate selection and highlight the potential of this laminate for PCB-based millimeter-wave antennas.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 3","pages":"46-49"},"PeriodicalIF":0.7000,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11359561","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEICE Communications Express","FirstCategoryId":"1085","ListUrlMain":"https://ieeexplore.ieee.org/document/11359561/","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
This letter presents the validation of a low-permittivity $(\varepsilon_{r}= 1.88)$ PCB substrate for compact, 28-GHz phased-array antennas. A grounded-coplanar-waveguide (CPWG) feed and a three-layer stack-up were verified using a TRL calibration board, confirming stable performance up to 60 GHz. A single via-fed patch antenna on the new laminate achieved 7.1 dBi gain, 3.2 dB higher than that on Megtron6 $(\varepsilon_{r}=3.7)$. A $1\times 4$ array was implemented on the same stack-up achieved 9.2 dBi broadside gain and up to 0.8 dB lower scan loss at 60° compared with Megtron6. These results demonstrate the importance of substrate selection and highlight the potential of this laminate for PCB-based millimeter-wave antennas.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
