Patent ID: 8648762

Claim:
An antenna device comprising: a substrate having opposite first and second surfaces; a signal-feed network including a micro-strip portion disposed on said first surface of said substrate, and a grounding portion disposed on said second surface of said substrate and corresponding in position with said micro-strip portion, said micro-strip portion including a signal-feed section for feeding of signals, and a plurality of first connecting sections that are electrically connected to said signal-feed section; and a plurality of first loop antennas arranged along a first peripheral edge of said grounding portion, each of said first loop antennas including a first radiator portion disposed on said first surface and electrically connected to a respective one of said first connecting sections, and a second radiator portion disposed on said second surface and electrically interconnecting said first radiator portion of said first loop antenna and said grounding portion, said first and second radiator portions of each of said first loop antennas cooperating to form a loop.