A Low-RCS Antenna Design with Polarization Conversion Metasurfaces

Based on the two principles of phase cancellation and polarization conversion, a low-RCS antenna array loaded with polarization conversion metasurface (PCM) is proposed in this paper. To realize the reduction of RCS in the high frequency band, a 180 degree difference is generated by adopting two different units. At the same time, in the low frequency band, a corresponding RCS reduction is realized by using H-shaped patch. The simulated results indicate that not only the radiation performance of the circularly polarized antenna can be improved effectively, but also the RCS can be reduced simultaneously. And the maximum value of reduction is about 13dB.