Patent ID: 8638271

Claim:
A multi-band antenna comprising: a dielectric substrate having a first side edge, a second side edge adjacent to said first side edge, a third side edge opposite to said second side edge, and a fourth side edge opposite to said first side edge; a main antenna member disposed on a surface of said dielectric substrate and including: a feed-in portion for feeding with a radio frequency signal; a first conductor arm connected to said feed-in portion, and extending adjacent to and along said first side edge toward said second side edge of said dielectric substrate; a second conductor arm connected to said feed-in portion, disposed adjacent to said first conductor arm, and having a length shorter than that of said first conductor arm; a third conductor arm connected to said feed-in portion, and extending toward said third side edge of said dielectric substrate for transmitting the radio frequency signal; a fourth conductor arm extending from said first side edge toward said fourth side edge of said dielectric substrate, and having a part extending along and spaced apart from said third conductor arm for coupling of the radio frequency signal; and a grounding portion disposed at said fourth side edge and adjacent to said feed-in portion; and a metal piece disposed at said first side edge of said dielectric substrate and connected to said fourth conductor arm, said metal piece resonating and coupling with said first conductor arm to form a first radiator section, and cooperating with said fourth conductor arm to form a second radiator section.