Abstract
A microstrip array antenna has been developed to achieve a high-gain antenna in millimeter-wave band. However, microstrip antennas suffer from high feeding-loss in high frequency band. Therefore, comb-line antenna with traveling-wave operation is applied. To reduce loss increasing due to manufacturing errors in millimeter-wave band and to realize an arbitrary linear polarization, we propose rounded radiating elements for comb-line antennas. The performance of its microstrip linear array with 45-degree polarization is evaluated by simulation in millimeter-wave band.
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