UWB Microstrip Patch Antenna with Reduced Radar Cross Section (RCS)

Abstract

The UWB platform has undergone several advances over the past decades due to its promising applications in both the military and commercial spheres. Due to its very-low profile, light weight, low transmission power, simplicity of fabrication and low manufacturing cost, the UWB Micro-strip antennas have extensive applications. With the massive growth in radar and stealth technology, Radar Cross Section (RCS) reduction is becoming ever more essential area of research. Antenna plays a significant role in adding up the overall RCS to the system as compared to the other communication devices. Nonetheless, RCS reduction is a challenging task to attain for the wide frequency range due to the degradation of performance of antenna in terms of its gain and radiation pattern. A enormous number of applications require not only good radiation pattern antenna but also reduced RCS. In this research, an antenna with frequency selective surface (FSS) is proposed which covers Ku/K frequency band 12-20 GHz. The simulated results has been compared with the measured results and good consent has been observed. The measure peak gain at 17.5 GHz is 8.1 dB. The maximum monostatic RCS -87.5 dBsm has been observed at 15.2 GHz wheras, minimum RCS -67.6 dBsm has been observed at 20 GHz. The proposed antenna with FSS is compact as compared with the existed literature.