Patent ID: 8405567

Claim:
An apparatus for controlling a radiation direction of a small sector antenna including a single radio frequency (RF) port and an array of a plurality of parasitic elements, the apparatus comprising: a plurality of capacitance blocks matched to the plurality of parasitic elements in a one-to-one manner and each respectively including a preset number of capacitors commonly connected to corresponding parasitic elements and each having a different capacitance; a plurality of switching units matched to the plurality of capacitance blocks in a one-to-one manner and including a plurality of selective contact points connected to the other ends of the capacitors of the corresponding capacitance blocks and a fixed contact point connected to a ground, and performing a switching operation such that the fixed contact point is connected to one of the plurality of selective contact points; and a controller controlling the plurality of switching units, and, wherein the preset number of capacitors is n=N s /2+1 number of capacitors, where N s is a preset number of sectors in the small sector antenna.