Patent ID: 8779988

Claim:
A surface mount device multiple-band antenna module, comprising: a substrate ( 1 ) having a first surface ( 11 ) and a second surface ( 12 ), the first surface ( 11 ) having two fixing points ( 18 ), a first grounding metal surface ( 13 ) and a first micro-strip line ( 14 ), an interval ( 15 ) being formed between the first grounding metal surface ( 13 ) and a first micro-strip line ( 14 ), the first grounding metal surface ( 13 ) having a second micro-strip line ( 16 ) connected thereto, the second micro-strip line ( 16 ) being parallel to the first micro-strip line ( 14 ), a space ( 17 ) being formed between the first micro-strip line ( 14 ) and the second micro-strip line ( 16 ); a carrier ( 2 ) electrically connected to the substrate ( 1 ) and having a first radiative metal portion ( 21 ), a second radiative metal portion ( 22 ) and a third radiative metal portion ( 23 ), the second radiative metal portion ( 22 ) being electrically connected to the first radiative metal portion ( 21 ), the third radiative metal portion ( 23 ) being not electrically connected to the first radiative metal portion ( 21 ) and the second radiative metal portion ( 22 ), wherein the first radiative metal portion ( 21 ) and the second radiative metal portion ( 22 ) are formed on outer surfaces at opposite sides of the carrier ( 2 ), respectively; wherein the first micro-strip line ( 14 ) is electrically connected to the joint of the first radiative metal portion ( 21 ) and the second radiative metal portion ( 22 ), and the third radiative metal portion ( 23 ) is electrically connected to the second micro-strip line ( 16 ), thereby, when a signal source ( 3 ) inputs through the first micro-strip line ( 14 ), and via the first radiative metal portion ( 21 ) and the second radiative metal portion ( 22 ) which respectively form a structure including high and low frequency resonance branches, the width of the space ( 17 ) between the first radiative metal portion ( 21 ) and the second radiative metal portion ( 22 ) is adjustable to fine tune a coupling capacitance therebetween, thus providing a high frequency resonance point by the first grounding metal surface ( 13 ), so as to increase the bandwidth, and wherein the two fixing points ( 18 ) are connected with the first radiative metal portion ( 21 ) and the second radiative metal portion ( 22 ) at opposite ends of a bottom surface of the carrier ( 2 ), respectively, and the location of one fixing point ( 18 ) connected with the first radiative metal portion ( 21 ) is other than the joint of the first radiative metal portion ( 21 ) and the second radiative metal portion ( 22 ) that is for connecting with the first micro-strip line ( 14 ).