S-shaped microstrip antenna design for 5 GHz WiFi

Abstract

Microstrip antenna is an antenna made of a thin metal strip capable of working at high frequencies. The microstrip antenna has been widely used in wireless technology, one of for WiFi (Wireless Fidelity) networks. In the study S-shaped microstrip antenna was designed and manufactured for the frequency of 5 GHz. Characteristics of the S-shaped microstrip antenna were determined both by using simulation and measurement based on the microstrip antenna parameters. The microstrip antenna was designed in an S-shaped patch configuration with a small dimension of 3.5 x 3.5 cm using copper (annealed) and the substrate was rectangular using lossy FR-4 material with a thickness of 1.6 mm. This research found that the S-shaped microstrip antenna works at a frequency of 5 GHz with a return loss of -19.076 dB, VSWR is 1.25, bandwidth is 227 MHz (4.54%), and again of 4.28 dBi. The radiation pattern of the E and H fields leads to a bidirectional pattern that emits and receives signals in two specific focal directions. Measurement results then showed that S-Shaped microstrip antenna works at a frequency of 5 GHz with a return loss of -15.33 dB, VSWR is 1.41, a bandwidth of 190 MHz (3.58%). The microstrip antenna can be applied to WIFi of the frequency of 5 GHz.