Re<scp>‐Evaluation</scp> of a <scp>Dual‐Feed</scp> Linear Polarized 2‐by‐2 Circular Patch Array Antenna for <scp>60‐GHz‐Band</scp> Digital Beamforming Applications

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  • Satoshi Yoshida
    Research Field in Engineering, Science and Engineering Area, Research and Education Assembly Kagoshima University 1‐21‐40 Korimoto Kagoshima 890–0065 Japan
  • Suguru Kameda
    Research Institute for Nanodevice and Bio Systems Hiroshima University 1‐4‐2 Kagamiyama Higashi‐Hiroshima 739–8527 Japan
  • Noriharu Suematsu
    Research Institute of Electrical Communication Tohoku University 2‐1‐1 Katahira, Aoba‐ku Sendai 980–8577 Japan
  • Kenjiro Nishikawa
    Research Field in Engineering, Science and Engineering Area, Research and Education Assembly Kagoshima University 1‐21‐40 Korimoto Kagoshima 890–0065 Japan

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<jats:p>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.</jats:p>

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