Broadband dual antenna system

A broadband dual antenna system, comprising:

• a dielectric substrate, including a first surface and a second surface opposite to each other;
• a grounding plane, located on a side edge of the dielectric substrate;
• a loop metal branch, located on the first surface of the dielectric substrate and connected to the grounding plane;
• a coupling metal branch, located on the second surface of the dielectric substrate and connected to the grounding plane, the vertical projection of the coupling metal branch and that of the loop metal branch on the second surface partially overlap;
• a first metal branch, located on the second surface of the dielectric substrate and located on one side of the coupling metal branch;
• a second metal branch, located on the second surface of the dielectric substrate and located on the other side of the coupling metal branch;
• a first signal source, located on the second surface of the dielectric substrate and connected to the first metal branch and the grounding plane;
• and
• a second signal source, located on the second surface of the dielectric substrate, and connected to the second metal branch and the grounding plane.