An antenna system including an antenna adjustable between a stowed configuration and a deployed configuration. The antenna includes a reflector having an annular array of spaced-apart ribs coupled to a hub, whereby the ribs can be adjustable between a collapsed configuration and an extended configuration in which the ribs outwardly extend from the hub. When the ribs dispose in the collapsed configuration, the antenna can be disposable in the stowed configuration; and when the antenna disposes in the deployed configuration, (i) the ribs can dispose in the extended configuration, and (ii) the reflector can be directionally adjustable, such as in both elevation and azimuth.