In this article, the design of a rectangular patch antenna in the millimeter-wave range is presented. The antenna is placed on a Rogers TC600 substrate with a dielectric constant of 6.15. The antenna resonance is kept around 28 GHz. The proposed work enhances the gain by placing a superstrate at a specific distance from the radiator equal to 0.5 λ, which reflects the electromagnetic wave between the two substrates and, consequently, enhances the gain. As a result, the proposed method enhances the gain by approximately 2.27 dB, which suitable for automotive applications at mm-wave band.

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