Printed antenna

A printed antenna, wherein the printed antenna is printed on a substrate, a feed module is further disposed on the substrate, and the printed antenna comprises a loop antenna body, a feed port, and at least one switch component;

• the loop antenna body comprises a first end and a second end, there is a spacing between the first end and the second end, a connection line between the first end and the second end forms a closed loop with the loop antenna body, the first end is configured to be connected to the feed module through the feed port, and the second end is configured to be connected a ground point (GND),
• the feed module is configured to output a feed signal to the loop antenna body through the feed port;
• the loop antenna body comprises a plurality of loop antenna branches, the switch component is disposed between every two adjacent loop antenna branches, and the switch component is configured to connect or disconnect the two adjacent loop antenna branches;
• the at least one switch component includes a first switch component and a second switch component,
• the plurality of loop antenna branches includes a first loop antenna branch, a second loop antenna branch, and a third loop antenna branch, the first loop antenna branch is adjacent to the second loop antenna branch, and the second loop antenna branch is adjacent to the third loop antenna;
• the first switch component is positioned between the first and second loop antenna branches, and the second switch component is positioned between the second and third loop antenna branches;
• and
• the printed antenna further comprises a first reflector antenna body having a first reflector antenna branch, a second reflector antenna branch, and a third switch component positioned between the first and second reflector antenna branches.