Patent ID: 8659479

Claim:
An antenna device comprising: a substrate having opposite first and second surfaces, and opposite first and second peripheral edges; a ground unit for grounding, said ground unit being disposed at said first peripheral edge of said substrate; a first radiator arm including a first connecting section disposed on said second surface of said substrate, coupled to said ground unit, and extending in a direction from said ground unit toward said second peripheral edge of said substrate, and a first radiator section connected to said first connecting section and extending along said second peripheral edge of said substrate; and a second radiator arm including a second connecting section disposed on said first surface of said substrate and coupled to said ground unit, a feed-in section for signal feed-in, said feed-in section being disposed on said first surface of said substrate and extending between said second connecting section and said second peripheral edge of said substrate, said feed-in section having a portion that extends parallel to said first radiator section, a second radiator section connected to said feed-in section and extending along said second peripheral edge of said substrate, and a third radiator section disposed on said first surface of said substrate, connected to said second radiator section, and extending between said second radiator section and said feed-in section, said third radiator section having a first portion that extends parallel to said second radiator section.