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

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. [ABSTRACT FROM AUTHOR]