Effects of superstrate on the performance of an elliptical shaped antenna without dots

This paper introduces the performance of an elliptical shaped antenna with random slots with the use of superstrate and compares the results between the original patch and the patch with superstrate layer but without dots. 5.8GHz is the reference or desired frequency set for measuring the performance of this antenna. The purpose of using superstrate is to optimize the gain and radiation efficiency for this antenna since microstrip antennas have limitations in gain and efficiency. For the design, three elliptical shaped slots with different dimensions were implemented and are connected to each other to allow current flow via coaxial feeding. Furthermore, 14 cylindrical dots are placed at the left most center of the radiating patch, specifically at the slot with the smallest elliptical dimensions. The usage of a high dielectric constant substrate or superstrate has an outstanding effect on the antenna's gain and efficiency. The antenna is capable of producing a maximum gain of 6.340dB with a very much enhanced radiation efficiency of 71.39% and total efficiency 66.61% without the presence of the dots. The presence of superstrate which is stacked above the antenna contributes to a much larger bandwidth of 204.1 MHz, making it applicable to 21
^st
century communication systems. The absence of cylindrical dots from the antenna unexpectedly produces a spectacular range of bandwidth which shows the unpredictable results the dots can have on the radiating patch. The advance in gain and bandwidth makes the antenna a promising candidate to be applied in everyday communication systems and devices.