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US 7,405,701 B2Granted
Multi-band bent monopole antenna
AssigneeSony Ericsson Mobile Communications AB
InventorMete Ozkar
Life of this patent
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AssigneeSony Ericsson Mobile Communications AB
InventorMete Ozkar
Estimating the term…
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.
A method for increasing a bandwidth of a multi-band antenna comprising:
A multi-band antenna for a wireless communication device comprising:
A wireless communication device comprising:
Dependencies are inferred from the claim text.