The Effects Evaluation of Various Dielectric Substrate of Square Patch Antenna on Sar Level for Human Head

摘要

A Square Patch Antennas (SPA) are first proposed and simulated. The antennas are designed to operate in L-band at 1.575 GHz for GPS applications. The antenna is the main source of EM radiation, so, the human body tissue can absorb it and cause a health effect. Specific Absorbing Rate (SAR) is the measure of the allowable scale of EM radiation to be produced by communication antenna in wireless device. In this study, SPAs are designed, simulated and then evaluated using CST Software 2014 for various dielectric substrate. Four different substrate materials with different dielectric constant are used in the design and simulation. The proposed antenna has been simulated with PCE material as square patch of length 43 mm and thickness of 0.6 mm. The dimensions of dielectric substrate material are varied. The thickness of dielectric substrate is 1.6 mm. The results show that, the increasing of the value of dielectric constant for the substrate materials will decrease values of the bandwidth, directivity and VSWR. In other side, the SAR levels for both IEEE and FCC standards are increased with increasing of the dielectric constant for substrate materials.