Power divider, feed network, and antenna system

An antenna system, comprising a feed network and one or more antenna elements connected to the feed network, wherein the feed network comprises:

• a metal ground plane;
• and
• a metal strip line, wherein the metal strip line is disposed on a side of the metal ground plane in a direction perpendicular to the metal ground plane, the metal strip line comprises a power division node, an input port, a first output port, and a second output port, and the power division node is configured to separately transmit, to the first output port and the second output port, a signal input from the input port, wherein:
• the metal strip line between the power division node and the first output port is a first output line, the first output line comprises a first node, and impedances of the metal strip line on two sides of the first node are different;
• the metal strip line between the power division node and the second output port is a second output line, the second output line comprises a second node, and impedances of the metal strip line on two sides of the second node are different;
• and
• a difference between a length of the metal strip line between the power division node and the first node and a length of the metal strip line between the power division node and the second node is an integer multiple of a quarter of an operating wavelength of the antenna system.