SIW-Based Waveguide Antenna With Structured Slots

Wifi signal optimization is done through antenna modification. This research describes the design and characterization of a waveguide antenna with slots arranged based on SIW. The antenna is designed to work at a frequency of2.4 GHz in accordance with the Wi-Fi frequency. The antenna design uses a 1.6 mm thick FR-4 Epoxy dielectric substrate material with a relative permittivity of 4.25. The antenna has dimensions of 203.7 mm $\times$ 37.5 mm with 4 identical rectangular slots arranged crosswise with a distance between the center points of adjacent slots of 37.3 mm. The rectangular slots have dimensions of 24 mm $\times$ 6 mm. This antenna consists of 3 patch parts put together, namely a rectangular patch, a connector patch, and a trapezium patch. The connector patch is rectangular with dimensions of 2.4 mm $\times$ 16 mm and the trapezium patch has a base side width of 37 mm and a height of 36 mm. Via is mounted on the periphery of a rectangular antenna with a diameter of 1 mm. The realization results show that the antenna still functions at a frequency of 2.4 GHz with a reflection coefficient of -11.72 dB and a bandwidth of1.67%.