Performance analysis of four stage design of a slotted microstrip rectangular patch antenna for multiband operation

This paper reviews the multiband performance of a microstrip rectangular slotted patch antenna towards the three-way slotting achieved in the four stage design process. The process iterates through the stages of a basic rectangular patch design, incorporation of a rectangular slot open ended at the two sides, introduction of a circular slot at the center of stage 2 design followed by the rectangular extensions of the circular slots. The substrate used is FR4 epoxy (h=1.6 mm)and the coaxial feeding technique has been employed. The design stages have been analyzed over HFSS for the major parameters including the reflection coefficient, bandwidth, radiation pattern and gain. The design results for each stage have been graphically shown and stated in the results section.