Dr. Michael Lanagan, Professor in Engineering Science and Mechanics, was recently highlighted in a recent issue of Institute of Electrical and Electronics Engineers (IEEE) magazine on his work with Reconfigurable Antennas. Reconfigurable antennas change polarization, operating frequency, or far-field pattern in order to cope with changing system parameters. This paper reviews some of the past and current technology applicable to reconfigurable antennas with several examples of implementations. Mechanically movable parts and arrays are discused, as well as more recent semiconductor-component and turnable-material technologies applicable to reconfigurable antennas.