Patent ID: 8760348

Claim:
A multi-band antenna, comprising: a base plate defining a rear edge, a front edge opposite to the rear edge, a right edge and a left edge opposite to the right edge, the right edge and the left edge being perpendicular to and connected with the rear edge and the front edge, a portion of the rear edge extending backward and then bending downward to form a feeding portion, an end of the front edge adjacent to the right edge extending frontward and inclining downward to form a connection section, a front end of the left edge extending leftward and then bending rearward to form a first connection strip coplanar with the base plate, an inverted-L shaped ground portion extending rearward and then bending downward from a rear end of the first connection strip; a first radiating element coplanar with the base plate including a first radiating strip extended rightward from a rear end of the right edge of the base plate, a second connection strip extended perpendicularly forward from a distal end of the first radiating strip, a curved second radiating strip extended rightward and away from the second connection strip from a distal end of the second connection strip, and a third radiating strip extended leftward and towards the connection section from a distal end of the second radiating strip; a second radiating element coplanar with the base plate and the connection section including an extension section of substantially lying-L shape extended leftward and then bent rearward from a portion of a left rim of the connection section adjacent to the front edge of the base plate, and a first extension strip extended rightward and towards a level arm of the ground portion with a free end thereof adjacent to the level arm of the ground portion; and a third radiating element including a second extension strip extended leftward from a lower end of the left rim of the connection section, a third extension strip apart and parallelly located under the second extension strip, and an extension plate connected with left ends of the second extension strip and the third extension strip and coplanar with the second extension strip and the third extension strip, wherein the extension section of the second radiating element is apart located between the first connection strip and the second extension strip of the third radiating element.