Broadband Low RCS and High Gain Radiation‐Scattering‐Integrated Metasurface Antenna Array

ABSTRACT In this letter, a radiation‐scattering‐integrated antenna designed according to the method of evolution from metasurface to antenna is presented. Firstly, specific metasurface units are arranged according to the cross‐type arrangement, and some of the units are excited as the radiating part of the antenna by adding probes and microstrip lines, and at the same time this part of the units is also an important part to realize the scattering function. Aiming at the inherent limitations of the cross‐arrangement in radar cross section (RCS) reduction, the innovative combination of metasurface parameter tuning and grounding plate slotting technology is used to accurately regulate the surface current distribution, and ultimately achieve a significant reduction of the antenna RCS. The final antenna gain reaches 13.9 dBi, more than 6 dB RCS with a bandwidth of 7.3–18.6 GHz. The antenna is overall compact with high gain and broadband RCS reduction.