Abstract
This research aims to increase the antenna gain by adding U-slot and Y-slot and using the air gap method at millimeter-wave frequency 28 GHz. In the previous studies have shown an increase in antenna gain by using additional slots on the microstrip patch antenna, such as the U-slot, V-slot or Y-slot method. The air gap arrangement on the double layer substrate antenna also has an impact on increasing the gain. For this reason, this study carried out the development of the design of the microstrip antenna structure with the addition of U-slots and Y-slots as well as the adjustment of the distance between the two substrates, so it is expected to significantly increase the antenna gain. This research was conducted using quantitative methods through calculating the design, simulation, and fabrication of the combination U-slot and Y-slot structures and arrangement the distance between two substrate layers. The antenna design uses the Rogers RT5880 substrate material with a dielectric constant (ε_r) = 2.2, and h = 0.787 mm with dimensions 18.5 × 31.5 mm. Simulation and measurement results show that the proposed combination method can increase the millimeter-wave antenna gain significantly and better than the results of previous studies.
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