A Monostatic and Bistatic RCS Reduction Using Artificial Magnetic Conductor Metasurface

communication shows how to reduce the radar cross section (RCS) by employing two artificial magnetic conductor (AMC) metasurface unit cells. The two AMCs cells are arranged in chessboard configuration to decrease both monostatic and also bistatic RCS using low-cost FR4 material. A 10 dB reduction in RCS can be obtained when the difference in phase between the reflected wave from AMC1 and AMC2 will be (180 degrees +/- 37 degrees) to make the waves that reflect from AMC1 and AMC2 interfere destructively. A significant reduction in RCS of checkerboard metasurface can be observed. The measured X-pol and Y-pol monostatic RCS of the proposed chessboard surface indicate that the reduction in RCS is over a frequency band from 23.71 to 33.52 GHz for X-pol and from 25 to 37.8 GHz for Y-pol with a maximum reduction in RCS of -27 dB for X-pol and maximum reduction of -25.9 dB for Y-pol. The bistatic RCS of the chessboard metasurface is also reduced and the incident plane wave scatters into five lobes in different directions.

Automated summary

This study demonstrates the reduction of radar cross section (RCS) by employing two artificial magnetic conductor (AMC) metasurface unit cells. The arrangement of these two AMC cells in a chessboard configuration using low-cost FR4 material leads to a significant reduction in monostatic and bistatic RCS. By introducing a phase difference of (180 degrees +/- 37 degrees) between the waves reflected from AMC1 and AMC2, a 10 dB reduction in RCS can be achieved through destructive interference. The proposed chessboard metasurface also exhibits a reduction in both X-pol and Y-pol monostatic RCS across specific frequency bands, with maximum reductions of -27 dB for X-pol and -25.9 dB for Y-pol. Additionally, the bistatic RCS of the chessboard metasurface is reduced, leading to scattering of the incident plane wave into five lobes in different directions.