Antenna system

An antenna system for wireless communication, comprising:

• a first radiator having a first resonance frequency;
• a second radiator having a second resonance frequency different from the first resonance frequency;
• a first electromagnetic coupler associated with the first radiator and a first frontend;
• a second electromagnetic coupler associated with the second radiator and a second frontend, the first radiator and the second electromagnetic coupler being disposed on a first surface of a printed circuit board (PCB), and the second radiator and the first electromagnetic coupler being disposed on a second surface of the PCB opposite the first surface of the PCB, wherein the first electromagnetic coupler at least partially overlaps the first radiator and the second electromagnetic coupler in a direction substantially perpendicular to the first and second surfaces, and the second radiator at least partially overlaps the second electromagnetic coupler in the direction substantially perpendicular to the first and second surfaces;
• and
• a switch configured to:
• connect the first electromagnetic coupler and the second electromagnetic coupler in an inter antenna aggregation configuration in a first mode of operation;
• and
• connect the first electromagnetic coupler and the second electromagnetic coupler in an intra antenna aggregation configuration in a second mode of operation.