Antenna assembly and electronic device

An electronic device comprising:

• a back cover, having an external side configured to be detachably fixed to an antenna assembly including a first antenna;
• a second antenna disposed inside the back cover;
• and
• an antenna chip, configured to be connected to the first antenna or the second antenna;
• wherein the first antenna includes:
• a substrate including a first surface and a second surface arranged opposite to each other;
• a first radiator disposed at the first surface and including two first radiation elements spaced apart from each other and connected to each other by a connector;
• and
• a second radiator disposed at the second surface and including a second radiation element disposed at an area of the second surface corresponding to an area of the first surface between the two first radiation elements;
• wherein each of the two first radiation elements and the second radiation element includes a current adjustment structure configured to adjust a current flow direction in the radiation element to which the current adjustment structure belongs;
• and
• wherein:
• the current adjustment structure in each of the two first radiation elements and the second radiation element includes a plurality of strip-shaped slits arranged sequentially in an extension direction of the connector and extending in a direction perpendicular to the extension direction of the connector;
• or
• each of the two first radiation elements and the second radiation element includes a plurality of strip-shaped hollow areas extending in the direction perpendicular to the extension direction of the connector.