Performance analysis of microstrip antenna with cotton as substrate at 3.5 GHz frequency for 5G applications.

The development of cellular communication technology has reached the fifth generation or 5G. One of the important components in cellular communication is the antenna. Nowadays antennas can be implemented on the human body by integrating textile materials into the antenna, i.e. wearable antenna. Wearable antennas must be small, thin and light. One type of antenna that meets these requirements is a microstrip antenna. In this article, the design and analysis of a rectangular patch microstrip antenna is carried out using a cotton substrate with a working frequency of 3.5 GHz. The analysis carried out only compares dielectric materials that can be categorized as clothing or textile materials, i.e. cotton. The results of the analysis are based on simulation results using the AWR Microwave Office software. The parameters analyzed include return loss, Voltage Standing Wave Ratio (VSWR), and input impedance. The FR-4 material which is commonly used for antenna design is used as a control variable. The antenna using cotton material as a substrate has dimensions of a patch width (W) of 37.6 mm, a patch length (L) of 32.1 mm, a feed line width (Wf) of 5.4 mm and a feed line length (Lf) of 19 mm. The results of the antenna simulation using cotton material in the frequency range of 3 GHz to 4 GHz, produce a return loss value of -37.58 dB, a VSWR of 1.027, and an input impedance (Zin) of 1.0042 - j0.02594Ω. The measurement results of each parameter are acceptable when compared to the FR-4 material. In this article, it is also concluded that the use of cotton material as an antenna substrate is acceptable and meets the criteria for an antenna with a working frequency of 3.5 GHz. [ABSTRACT FROM AUTHOR]