In-band RCS Reduction of Microstrip Patch Antenna using Artificial Magnetic Conductors at X-Band for Stealth Technology

In this article two miniaturized artificial magnetic conductor(AMC) unit cells have been designed to reduce the RCS of microstrip patch antenna at X-band. The scattering performance of the patch antenna has been determined by using one checkerboard metasurface and one aperiodic metasurface to improve the scattering performance of the antenna. The antenna provides the wide impedance bandwidth of 26%. Because of the AMC metasurface's effectiveness in reducing surface waves, the antenna's radiating performance has been significantly enhanced as a result. While the results of the simulation show a remarkable RCS reduction of 14 dB throughout the X-band for both the polarizations, the results of the measurement show that they are in good agreement with simulated response. In order to facilitate a deeper comprehension of the scattering performance, 3D RCS plots have also been presented. The radiation performance of the antenna has been measured, and the results show a pattern that is almost identical to the one that was simulated.