| Summary: | This paper presents the three-stage design of a grounded coplanar waveguide (GCPW) microstrip array antenna with via-holes beyond 100 GHz. The design was with a time-domain solver at the Computer Simulation Technology Microwave Studio (CST MWS) simulator, while the comparison was with the frequency-domain solver at the CST MWS simulator. As a result, a good agreement was achieved, which validated the proposed antenna. Furthermore, simulated results of the proposed antenna showed a bandwidth (BW), working frequencies, peak gain, and peak directivity of 24.22 GHz, 107.41–133.54 GHz, 12.1 dB, and 12.98 dBi, respectively. Thus, this GCPW microstrip array antenna can be suitable for beyond 100 GHz integrated vehicular autonomous and next-generation wireless communication networks at the sixth generation (6G) after a suitable experimental verification.
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