A feed system, wherein the feed system is located on a back surface of a metal plate of the feed system, and the feed system comprises a plurality of first feed chambers and a plurality of first feed striplines suspended in the plurality of first feed chambers; each of the plurality of first feed striplines comprises a plurality of output ports, and the plurality of first feed chambers and a ground plane of the metal plate share a metal surface; and the metal surface has a plurality of openings corresponding to a plurality of first radiating elements located on a front surface of the metal plate, the plurality of output ports of each first feed stripline are connectable, in a one-to-one manner, to the plurality of first radiating elements through the plurality of openings, and the plurality of first feed striplines are configured to provide transmission signals for the plurality of first radiating elements, wherein the feed system further comprises: a plurality of second feed chambers and a plurality of second feed striplines suspended in the plurality of second feed chambers; each of the plurality of second feed striplines is connectable to a plurality of second radiating elements located on the front surface of the metal plate; and each second feed stripline is configured to provide transmission signals for the plurality of second radiating elements connectable to the second feed stripline, and the plurality of second feed chambers are perpendicular to or parallel to the plurality of first feed chambers, wherein the plurality of first feed chambers comprise a first chamber and a second chamber that are disposed in parallel on the back surface of the metal plate, and the feed system further comprises an isolation chamber or a gap between the first chamber and the second chamber; the plurality of second feed chambers comprise a third chamber and a fourth chamber that are disposed in parallel, and the third chamber and the fourth chamber are perpendicular to the metal plate; and the first chamber and the second chamber are located between the third chamber and the fourth chamber, the first chamber is connected to the third chamber, and the second chamber is connected to the fourth chamber. each of the plurality of first feed striplines comprises a plurality of output ports, and the plurality of first feed chambers and a ground plane of the metal plate share a metal surface; and the metal surface has a plurality of openings corresponding to a plurality of first radiating elements located on a front surface of the metal plate, the plurality of output ports of each first feed stripline are connectable, in a one-to-one manner, to the plurality of first radiating elements through the plurality of openings, and the plurality of first feed striplines are configured to provide transmission signals for the plurality of first radiating elements, wherein the feed system further comprises: a plurality of second feed chambers and a plurality of second feed striplines suspended in the plurality of second feed chambers; each of the plurality of second feed striplines is connectable to a plurality of second radiating elements located on the front surface of the metal plate; and each second feed stripline is configured to provide transmission signals for the plurality of second radiating elements connectable to the second feed stripline, and the plurality of second feed chambers are perpendicular to or parallel to the plurality of first feed chambers, wherein the plurality of first feed chambers comprise a first chamber and a second chamber that are disposed in parallel on the back surface of the metal plate, and the feed system further comprises an isolation chamber or a gap between the first chamber and the second chamber; the plurality of second feed chambers comprise a third chamber and a fourth chamber that are disposed in parallel, and the third chamber and the fourth chamber are perpendicular to the metal plate; and the first chamber and the second chamber are located between the third chamber and the fourth chamber, the first chamber is connected to the third chamber, and the second chamber is connected to the fourth chamber. a plurality of second feed chambers and a plurality of second feed striplines suspended in the plurality of second feed chambers; each of the plurality of second feed striplines is connectable to a plurality of second radiating elements located on the front surface of the metal plate; and each second feed stripline is configured to provide transmission signals for the plurality of second radiating elements connectable to the second feed stripline, and the plurality of second feed chambers are perpendicular to or parallel to the plurality of first feed chambers, wherein the plurality of first feed chambers comprise a first chamber and a second chamber that are disposed in parallel on the back surface of the metal plate, and the feed system further comprises an isolation chamber or a gap between the first chamber and the second chamber; the plurality of second feed chambers comprise a third chamber and a fourth chamber that are disposed in parallel, and the third chamber and the fourth chamber are perpendicular to the metal plate; and the first chamber and the second chamber are located between the third chamber and the fourth chamber, the first chamber is connected to the third chamber, and the second chamber is connected to the fourth chamber.