Bandwidth Enhancement in Circular Patch Antenna using Inset Feed and Slot for Ku-band Applications

Circular patch antennas with inset feed and slot configurations have been developed to enhance bandwidth for Ku-band applications. By integrating an inset feed, the impedance matching of the circular patch antenna is significantly improved, while the slot introduces additional resonances, effectively broadening the antenna’s bandwidth. A comprehensive parametric analysis of the design parameters was conducted to confirm the bandwidth enhancement. Furthermore, the combination of the inset input and the slot optimizes the input impedance, resulting in enhanced performance. The final antenna design achieves an impressive bandwidth in a range of 11 to $\mathbf{1 3. 5 ~ G H z}$ ($\mathbf{2 0. 4 \%}$).