A multi-band antenna, including a reflector; a first radiating element that is mounted to extend forwardly from the reflector and configured to operate within a first frequency band; a second radiating element that is mounted to extend forwardly from the reflector and configured to operate within a second frequency band that is different from the first frequency band; and a metamaterial adjusting element that is mounted to extend forwardly from the reflector and configured to reflect electromagnetic radiation incident on the metamaterial adjusting element that is within a first portion of the second frequency band.