Abstract: A solid antenna disposed on a substrate includes a first grounding portion disposed on the substrate, a feeding portion perpendicular to the substrate, a radiating portion, and a coupling portion disposed on the substrate and separated from the radiating portion. The radiating portion includes a first radiating part, a second radiating part, a connection part, a third radiating part perpendicularly connected to the feeding portion, and a fourth radiating part connected in series. The second radiating part, the connection part, and the third radiating part are disposed on a plane parallel with the substrate. Both the first radiating part and the fourth radiating part extend from the plane to the substrate. The coupling portion is disposed on the substrate and is separated from the radiating portion.