| 摘要 |
<p>The method and apparatus described herein improves the bandwidth of a selected frequency band of a multi-band antenna (100). In particular, a selection circuit selectively (140) applies capacitive coupling to the multi-band antenna (100) 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 (100) of the present invention comprises a main antenna element (110) and a parasitic element (120) disposed proximate the main antenna element (110). When the multi-band antenna (100) operates in the first frequency band, the main antenna element (110) capacitively couples to the parasitic element (120). However, when the multi-band antenna (100) operates in the second frequency band, the selection circuit(140) disables the capacitive coupling. By applying the capacitive coupling only when the multi-band antenna (100) 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.</p> |
