TY  - JOUR
T1  - The Effects Evaluation of Various Dielectric Substrate of
Square Patch Antenna on Sar Level for Human Head
AU - H. Ali, Israa AU - Khlf Ahmed, Riyadh 
JO  - Journal of Engineering and Applied Sciences
VL  - 13
IS  - 9
SP  - 2761
EP  - 2766
PY  - 2018
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2018.2761.2766
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2018.2761.2766
KW  - Square patch antenna
KW  -GPS
KW  -variable dielectric constant
KW  -Specific Absorption Rate (SAR)
KW  -VSWR
KW  -bandwidth
AB  - 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.
ER  -