In this work, applications involving a radiation reconfigurable antenna are presented and discussed. The antenna is capable of reconfiguring its radiation pattern from broadside to endfire over a common impedance bandwidth. After outlining the operation and radiation behavior of the single element its use in multiple antenna systems, such as multiple input-multiple output (MIMO) and diversity systems, is described. Recent results using the antenna in both one-dimensional and two-dimensional planar arrays setting are also included. These examples illustrate the potential benefits and impact that pattern reconfigurable antennas can have in diverse kinds of wireless communications networks.