Metantennas: Opportunities and Challenges in Future Microwave Metasurface Antenna Research and Applications

Metantennas have treasured enormous opportunities in antenna designs but along with arduous challenges. The views and overviews of critical issues, such as ohmic losses, of metamaterials and metasurfaces-based antenna designs at microwave bands are shared. The opportunities and challenges in future metantenna research and applications are predicted and proposed hopefully to pave future ways to enhance performance and introduce more functions of microwave antennas.