the method and apparatus described herein improves the bandwidth of a selected frequency band of a multi - band antenna . in particular , a selection circuit selectively applies capacitive coupling to the multi - band antenna to improve the bandwidth of a first frequency band without adversely affecting the bandwidth of a second frequency band . to that end , the multi - band antenna of the present invention comprises a main antenna element and a parasitic element disposed proximate the main antenna element . when the multi - band antenna operates in the first frequency band , the main antenna element capacitively couples to the parasitic element . however , when the multi - band antenna operates in the second frequency band , the selection circuit disables the capacitive coupling . by applying the capacitive coupling only when the multi - band antenna operates in the first frequency band , the present invention increases the bandwidth of the first frequency band without adversely affecting the bandwidth of the second frequency band .