| Abstract: | A wideband low-radar cross section (RCS) circularly-polarized (CP) holographic antenna (HA) based on hybrid metasurface is proposed. The proposed HA is composed of a source antenna, a holographic metasurface (HM) and a hybrid metasurface. The HM is designed to transform a surface wave (SW) into a right-hand CP wave. A novel hybrid meatasurface is proposed, which is the main contribution in this paper. The hybrid metasurface consists of two kinds of frequency-selective absorbers (FSAs), both of which exhibit transmission characteristic for in-band waves so that a good radiation performance is maintained. For the out-of-band waves, HM and hybrid metasurface act together as an absorber within 3–11 GHz. On the contrary, they act as two kinds of reflective FSAs (RFSAs) with 180° ± 37° reflection phase difference within 17–24 GHz. Thus, the RCS is effectively reduced within 3–24 GHz. Finally, a reasonable agreement is obtained between measured and simulated results. |
