Analysis And Simulation Of Fractal Multiband Antenna For On Body Application

Mohammad Abdul Latiff, Ja'afar (2015) Analysis And Simulation Of Fractal Multiband Antenna For On Body Application. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Nowadays, any part of this world is surrounded by many wireless devices. Wireless application such as mobile phones, GPS or other wireless devices has become a part of modern society lives and works as it make our life easier. It means that we are always interacting with electromagnetic fields. Thus, it is very important scenario to be study due to the possible health effects that these electromagnetic fields can cause in humans. This project is focused on the study of the antenna parameters and radiation effects on the human arm model produced by the microstrip antenna. The microstrip antenna is a fractal multiband antenna. The special feature of this antenna is it wearable to any part of arm body which transmits signal within mobile communication applications (0GHz – 3 GHz). Three different fractal multiband antennas are used for this project. There are two conditions of observation which are antenna in free space condition and antenna attach to the human arm model condition. Both conditions were analysed, in term of antenna performances such as frequency, return loss, realized gain, directivity and efficiency. After that, the measurements are carried out in the proximity of human arm model which commensurate with the antenna field regions and the size of antenna’s reactive near-field that is satisfied to be an important factor in the evaluation of an acceptable on-body operation. For instance, one fractal antenna result in free space condition is used as a parameter’s proof. The resonant frequencies are 0.852 GHz, 1.8391 GHz and 2.3251 GHz. The return loss are -13.716 dB, -16.599 dB and -20.26 dB. The values of gain are 2.90 dB, 2.960 dB and 1.689 dB. Therefore, those parameters are satisfied. There is significant differences between different antennas were observed through investigations. The results of this study are helpful to engineers evaluating antennas for the use in fractal multiband antenna applications.

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