Study Of The Performance Of Microstrip Compact Antenna With Slope Thickness Of The Substrate

Abstract-Performance of microstrip compact antenna with slope thickness of substrate was analyzed using FD-TD Method and was tested experimentally. The whole antenna size is 100 mm x 100 mm x 2 mm using dielectric substrates 3.4. The proposed antenna was fabricated based on PCB-FR4 (Printed Circuit Board) using the photolithography process. The simulation and experimental results are compared in their characteristics. The novelty in this paper is the difference of the substrate width; the variation of the substrate width is 1h, 3h, and 5h with a value of h is 1.6 mm. The proposed antenna has two resonance frequency on 1.2 GHz and 2.4 GHz range. The novelty in this research is the change in the shape of the dielectric taper design causes a frequency shift, change in impedance values, and patterns of polarization. The addition of the substrate geometry antenna causes the antenna resonance frequency shifts to a lower frequency range; the first resonant frequency shifted from 1.41 GHz to 1.3 GHz and the second resonance frequency shift of 2.66 GHz to 2.43 GHz. Value of the impedance on that range for 5h width is 80.1- 45.2i Ohm, so the proposed antenna has capacitive characteristic more than width 1h and 3h. Besides the addition of the substrate thickness can affect the shape changes from linear polarization to circular polarization.