Dual antenna device

A dual antenna device, comprising:

• a substrate comprising an installation surface;
• a first antenna comprising a first grounding edge, a first shorting edge and a first opening edge, wherein the first antenna protrudes from the installation surface and couples to the installation surface by the first grounding edge, wherein the first shorting edge couples to the first grounding edge and extends along a direction facing away from the installation surface, wherein the first opening edge is substantially in parallel to the first grounding edge and couples to the first shorting edge;
• a second antenna, comprising a second grounding edge, a second shorting edge and a second opening edge, wherein the second antenna protrudes from the installation surface and couples to the installation surface by the second grounding edge, wherein an extension direction of the second grounding edge and an extension direction of the first grounding edge form an angle, wherein the second shorting edge couples to the second grounding edge and extends along the direction facing away from the installation surface, wherein both the second shorting edge and the first shorting edge are located in a first reference plane, wherein the second opening edge is substantially in parallel to the second grounding edge and couples to the second shorting edge;
• and
• an isolation element, comprising a first isolation portion and a second isolation portion, wherein the isolation element protrudes from the installation surface and disposes in a second reference plane vertical to the substrate so that the first antenna and the second antenna respectively locate at both sides of the second reference plane, wherein the isolation element couples to the installation surface by a bottom side of the first isolation portion, wherein the isolation element and the first antenna form a first interval in the extension direction of the first grounding edge, wherein the isolation element and the second antenna form a second interval in the extension direction of the second grounding edge, wherein the second isolation portion couples to one side of the first isolation portion and passing through the first reference plane.