MULTIBAND ANTENNA STRUCTURE AND METHODS
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United States of America Patent
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Issued Date -
Oct 11, 2012
app pub date -
Dec 8, 2010
filing date -
Dec 14, 2009
priority date (Note) -
Abandoned
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Abstract
An antenna structure intended for small-sized mobile terminals. In one embodiment, the antenna structure comprises a main radiator for implementing the lowest operating band and other radiators for implementing at least one operating band in the high band. The structure also comprises a matching circuit, by which a plural (e.g., double) resonance is implemented for the main radiator in the range of the lowest operating band and the isolation is improved between the main radiator and another radiator. A reactive element is joined to the main radiator so that its electric size decreases in the high band and increases in the low band. The former strengthens the resonances in the high band, and thus results in rise in the efficiency in the high band.
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