Effects of parasitic ring on the performance of an elliptical shaped antenna

This paper introduces the performance of an elliptical shaped antenna with random slots with the use of parasitic element and compares the results between the original patch and the patch with parasitic ring mounted on foam. 5.8GHz is the reference or desired frequency set for measuring the performance of this antenna. The purpose of using parasitic element is to optimize the gain and radiation efficiency of this antenna since microstrip antennas has weaknesses in gain and efficiency. Three elliptical shaped slots with different dimensions are designed and connected to each other to allow equal surface current distribution throughout the radiating patch. In addition, 14 cylindrical dots with different radius were designed at the left most center of the patch, making it as a part of the antenna. The parasitic ring element will be supported by 2 different forms of substrate which is foam and a high dielectric constant material. However it is tested one at a time. Adopting the parasitic element method has provided outstanding effects on the antenna's gain and efficiency. The antenna manages to radiate a maximum gain of 4.714dB. The radiation efficiency and total efficiency of the antenna has improved significantly with the usage of parasitic ring. The proposed antenna can be used for point to point communication and other applications under the same frequency range if the research done is considered successful.