In this letter, re-evaluation results of a 60-GHz-band digital beamforming antenna using a dual-feed linear polarized 2 × 2 circular patch array antenna is reported. The extension from our previous report is providing new measurement data under the condition of all intermediate frequency (IF) signal usage by re-fabrication, although we reported imperfect measurement results using the IF signals only 5 ch out of 8 ch in the previous report due to the fabrication error. A low temperature solder paste was newly used to prevent the warp of the multilayered substrate. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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重新评估用于 60 GHz 频段数字波束成形应用的双馈线极化 2×2 圆形贴片阵列天线

在这封信中，报告了使用双馈线极化 2 × 2 圆形贴片阵列天线的 60 GHz 频段数字波束成形天线的重新评估结果。我们之前报告的扩展是通过重新制造在所有中频 (IF) 信号使用的条件下提供新的测量数据，尽管我们在之前的报告中报告了使用 IF 信号的 8 通道中只有 5 通道的不完美测量结果到制造错误。为了防止多层基板翘曲，新使用了低温焊膏。© 2021 日本电气工程师学会。由 Wiley Periodicals LLC 出版。