Dual band antenna

A dual band antenna comprising:

• a planar conductive element including:
• a large grounding portion;
• a strip-like radiation portion extending in a first direction and parallel to said grounding portion;
• and
• a lying Z-like connection portion with two opposite ends connected to said radiation portion and said grounding portion, respectively,
• said Z-like connection portion including a first segment and a second segment both extending in a second direction perpendicular to said first direction and connected with each other via a third segment;
• and
• a feeder cable including an outer braiding connected to said grounding portion and an inner conductor connected to a position of said third segment along said first direction.

A dual band antenna comprising:

• a planar conductive element including:
• a large grounding portion;
• a strip-like radiation portion extending in a first direction and parallel to said grounding portion;
• and
• a lying Z-like connection portion with opposite first and second ends connected to said radiation portion and said grounding portion, respectively,
• said Z-like connection portion including a first segment and a second segment connected with each other via a third segment;
• and
• a feeder cable including an outer braiding connected to said grounding portion and an inner conductor connected to a position of said third segment;
• wherein said first end divides said radiation portion into two unequal sections so as to formed two PIFAs back to back arranged with each other.