One of the benefits of a vertical monopole discussed in the previous chapter is omnidirectional azimuth radiation pattern. This is ideal in some applications, such as broadcasting or for a base station that needs to communicate with mobile stations in many directions. The other side of that coin is that the radiation intensity in any particular direction is less than would result from most horizontal antennas with their limited azimuth coverage. However, by using multiple monopoles arranged in arrays virtually any desired azimuth coverage can be obtained with resulting gain in desired directions. In some cases the same physical antenna array can be aimed in different directions in response to changes in requirements.