Patent ID: 8203489

Claim:
A dual-band antenna comprising: a ground plane; a loop antenna connected to said ground plane, said loop antenna having a radiator that forms a loop, said radiator having a first end and a second end adjacent to said first end, and being capable of resonating at a first frequency band, said loop antenna being a quarter-wavelength rectangular loop antenna; a monopole antenna having one end connected to said first end of said radiator of said loop antenna, and being capable of resonating at a second frequency band; a feed point disposed at a connection between said first end of said radiator of said loop antenna and said one end of said monopole antenna; a ground point disposed at said radiator of said loop antenna proximate to said second end of said radiator; and a substrate having a first surface, a second surface opposite to said first surface, and first and second conductive vias extending through said first and second surfaces and spaced apart from each other, said ground plane and said loop antenna being disposed at said first surface of said substrate, said monopole antenna including a first radiator section and a second radiator section, said first radiator section being disposed at said first surface of said substrate, extending outwardly from said second conductive via and being disposed at one side of said loop antenna, said second radiator section being disposed at said second surface of said substrate and extending from said first conductive via to said second conductive via, said first conductive via being connected electrically to said first end of said loop antenna.