Parasitic Slotted Patch Antenna for Dual-Band Operation over S-Band

The Microstrip patch antenna is widely used in antenna design and for various purposes due to its features. However, it suffers from two significant drawbacks: the lack of gain and the narrow bandwidth. This paper presents a low-profile antenna with a simple design and low cost, making it very suitable for array applications. An improvement in gain and bandwidth has been achieved. The antenna is designed using a substrate with a relative permittivity of 4.08, a thickness of 1.5 mm, and a coaxial feeding technique. Simulations are performed using the CST design tool. A parasitic patch antenna with the slotted technique was used to achieve dual-band operations with consistent gain and linear polarization over the operational bands, the antenna configuration of two patches with cross slotting along with the second patch, this structure achieves reflection coefficient S11 less than −22db, dual bandwidth with gain =5.7 dB and 4.06 dB over the operating bands.