Design and analysis of metamaterial based patch antenna with low SAR for healthcare applications
Loading...
Date
2022-10
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
G. B. Pant University of Agriculture and Technology, Pantnagar
Abstract
A new metamaterial-based UWB antenna with a frequency range of 2–12 GHz is described. This antenna employs metamaterial with a low specific absorption rate. Wearable antennas are becoming more and more necessary, exclusively in the field of healthcare. The antenna is positioned in free space for the analysis and then close to the human body. The antenna's parameters are then measured, simulated, and compared. The designed antenna involves the use of an Fr4 substrate with a 1.3 mm thickness and dimension of 30 mm*30 mm. The curves are added along with slotting on the ground and patch. Metamaterial SRR is used to enhance the overall bandwidth of the antenna and reduces the SAR rate. The antenna shows better results for off and on the body when placed on the human body. It is observed that there is a reduction in gain and radiation efficiency when the antenna is placed near the human body. The proposed antenna is simulated using Ansoft HFSS software, fabricated in a PCB designing machine, and tested using VNA. The proposed antenna resonates in UWB frequency bands with a bandwidth of 9 GHz having a gain above 5 dB and efficiency above 90%. The measured return is in good agreement with the simulated one. The performance of the proposed antenna is far better than earlier reported work. It can be determined from the results that the antenna will work efficiently for healthcare applications with low SAR.