Dual-Band Triple-Slot Microstrip Antenna for X-Band and Ku-Band Communication

This paper presents the design and optimization of a dual-band triple-slot rectangular microstrip antenna for X -band ($\mathbf{8 . 6 0} \mathbf{~ G H z}$) and Ku -band ($\mathbf{1 3 . 8 9} \mathbf{~ G H z}$) applications. The primary objective is to enhance satellite communication and radar system performance by achieving efficient dual-band operation with significant improvements in key performance metrics. The antenna is fabricated using a Rogers Duroid 5880 substrate, which offers a dielectric constant of 2.2 and a thickness of 1.6 mm, reducing dielectric losses and improving overall efficiency. The inclusion of a Defected Ground Structure (DGS) further enhances bandwidth and radiation efficiency. Simulation results show substantial improvements, with return loss values of $\mathbf{- 1 6 . 2 4} \mathrm{dB}$ at 8.33 GHz and $-\mathbf{3 8 . 4 5} \mathrm{dB}$ at 13.89 $\mathbf{G H z}$, and a gain of 4.959 at X -band and 5.149 dBi at Ku- band. These results demonstrate efficient impedance matching, minimal signal loss, and improved radiation patterns, making the design well-suited for advanced communication applications in satellite and radar systems.