Metamaterials and metasurfaces have revolutionized  electromagnetic engineering by facilitating exceptional control over wave propagation, radiation, and scattering. In contrast to traditional materials, these intentionally designed structures obtain their characteristics from geometry
rather than composition, facilitating advanced functions such as phase equalization, wavefront manipulation,  and  downsizing.  This  presentation  emphasizes  innovative  breakthroughs  in metamaterial and metasurface antennas, underscoring their promise in next-generation wireless
communication systems. The session includes theory, simulation, prototyping, and measurement insights to furnish both foundational knowledge and practical viewpoints. This discussion will encompass a series of antenna  advancements, specifically substrate-integrated waveguide (SIW) antennas with epsilon-near-zero (ENZ) material configurations, and ultra-wideband metasurface antennas  for  millimeter-wave  applications.  ENZ  materials  are  utilized  to  provide  a  typical electromagnetic  tunneling  via  ultra-thin  subwavelength  channels,  hence  permitting  highly directional  narrowband  antenna  designs.  Metamaterial  and  metasurface  antennas  exhibit enhanced directivity, scalability, and functional diversity relative to traditional antenna designs, facilitating their extensive implementation in novel wireless applications.