Desain Antena Mikrostrip Rectangular Patch dengan Inset-feed dan Teknik DGS untuk Meningkatkan Bandwidth pada WiFi 2,45 GHz

Abstract

WiFi is still one of the most wireless communication technologies widely used today. The aims of this research to design a rectangular patch microstrip antenna with inset-feed and DGS (Defected Ground Structure) technique in 2.45 GHz frequency which is applied to WiFi. DGS technique is to remove or etch some of the radiation field on the ground with a certain pattern. This design using line feeding technique with the inset-feed method, it obtain optimal matching impedance. The methodology compares the design and simulation results of rectangular patch antenna with inset-feed without DGS and by applying DGS technique. The substrate material is RT Duroid 5880 with a relative permittivity 2.2 and thickness 1.57 mm. The design of  rectangular inset-feed patch microstrip antenna without DGS having a patch size 40.2467 mm x 47.998 mm and with DGS a patch size 42,264 mm x 50,405 mm. The simulation results of a rectangular patch microstrip antenna without DGS have a return loss value of -24.08 dB, VSWR 1.13, gain 6.51 dB, radiation pattern is directional, and bandwidth only 38.8 MHz. While the simulation results of the rectangular patch microstrip antenna with DGS have a return loss value of -24.511 dB, VSWR 1.126, gain 3.97dB, directional radiation pattern, and has 106.3 MHz bandwidth. It’s proved that the inset-feed rectangular patch microstrip antenna with DGS is able to increase the bandwidth almost three times compared to without DGS.