Twin monopole antenna

A twin monopole antenna, is implemented in a wireless communication, comprising:

• a substrate consisting of a first surface and a second surface, wherein the first surface is located on one side of the substrate and the second surface is located on the other side of the substrate;
• a first ground plane located on the first surface of the substrate, and the first ground plane is consisting of a second ground plane, a third ground plane and a fourth ground plane;
• a fifth ground plane located on the second surface of the substrate, the fifth ground plane comprising:
• a sixth ground plane;
• and
• an inverted-U shaped ground plane, wherein the inverted-U shaped ground plane has a hollow rectangular surface;
• a first radiating line, that is located on the first surface of the substrate, and has a first width, wherein a first included angle is located between the first radiating line and the third ground plane, and a first corresponding interval is located between the first radiating line and the inverted-U shaped ground plane;
• and
• a second radiating line, that is located on the first surface of the substrate and has a second width, wherein a second included angle is located between the second radiating line and the third ground plane, and a second corresponding interval is located between the second radiating line and the inverted-U shaped ground plane, and an interval is located between the first radiating line and the second radiating line.