Wideband Radar Cross Section Reduction via Symmetrical Slotted Unit Cell Based Metasurface

A design of symmetrically slotted circular unit cell is presented in this paper using polarization converting metasurface(PCMS) for lowering the radar cross section (RCS). The unit cell achieves a polarization conversion ratio (PCR) of 90% by performing polarization transformation. A triangular arrangement is followed to organize the designed unit cell. When the unit cells are positioned at specific angles in a chess-board array, the phase cancellation approach produces destructive interference. In a frequency range of 18 GHz to 40 GHz, a 76% fractional bandwidth is obtained providing a 10 dB RCS reduction