An antenna, comprising: n radiating elements (1011,1012,1013...... 101n); a power splitter or a phase shifter, comprising n output ends (N1, N2, N3,..., and Nn) and m input ends (M1, M2,..., and Mm), wherein the n output ends (N1, N2, N3,..., and Nn) are respectively connected to the n radiating elements (1011,1012,1013...... 101n), and any one of the m input ends (M1, M2,..., and Mm) is connected to at least one of the n output ends (N1, N2, N3,..., and Nn); and a switching switch, comprising m first ports, K second ports, and a switch element, wherein the m first ports are respectively connected to the m input ends (M1, M2,..., and Mm); the K second ports are configured to couple an input signal; and the switch element is configured to switch a connection relationship between the m first ports and the K second ports, so as to selectively output the input signal to at least one first port, wherein n and m are integers greater than 1, and K is an integer greater than or equal to 1, wherein the switch element comprises p fixed strips (P1, P2,..., and Pp) and q movable strips (Q1, Q2, Q3,..., and Qq); and ends of m fixed strips in the p fixed strips act as the m first ports, the q movable strips are selectively connected to the p fixed strips, and m ≤ p, wherein ends of K fixed strips in the p fixed strips act as the K second ports, and K ≤ p, wherein the switch element further includes at least one pull rod connected to at least one of the q movable strips, so that a position of a movable strip connected to the at least one pull rod can be changed by using the pull rod, to selectively connect the movable strip to a fixed strip, wherein the p fixed strips comprise a first fixed strip to a fourth fixed strip (11, 12, 13, 14), wherein the first fixed strip, the second fixed strip, and the fourth fixed strip are respectively connected to first input end, second input end, and third input end, and an end of the third fixed strip acts as one of the K second ports; and the q movable strips comprise a first movable strip to a third movable strip (21, 22, 23); and wherein the q movable strips are selectively connected to the p fixed strips is specifically: the first movable strip is connected to the first fixed strip and the third fixed strip in a first operating mode set by the switching switch; and the second movable strip is connected to the first fixed strip and the second fixed strip, and the third movable strip is connected to the third fixed strip and the fourth fixed strip in a second operating mode set by the switching switch. n radiating elements (1011,1012,1013...... 101n); a power splitter or a phase shifter, comprising n output ends (N1, N2, N3,..., and Nn) and m input ends (M1, M2,..., and Mm), wherein the n output ends (N1, N2, N3,..., and Nn) are respectively connected to the n radiating elements (1011,1012,1013...... 101n), and any one of the m input ends (M1, M2,..., and Mm) is connected to at least one of the n output ends (N1, N2, N3,..., and Nn); and a switching switch, comprising m first ports, K second ports, and a switch element, wherein the m first ports are respectively connected to the m input ends (M1, M2,..., and Mm); the K second ports are configured to couple an input signal; and the switch element is configured to switch a connection relationship between the m first ports and the K second ports, so as to selectively output the input signal to at least one first port, wherein n and m are integers greater than 1, and K is an integer greater than or equal to 1, wherein the switch element comprises p fixed strips (P1, P2,..., and Pp) and q movable strips (Q1, Q2, Q3,..., and Qq); and ends of m fixed strips in the p fixed strips act as the m first ports, the q movable strips are selectively connected to the p fixed strips, and m ≤ p, wherein ends of K fixed strips in the p fixed strips act as the K second ports, and K ≤ p, wherein the switch element further includes at least one pull rod connected to at least one of the q movable strips, so that a position of a movable strip connected to the at least one pull rod can be changed by using the pull rod, to selectively connect the movable strip to a fixed strip, wherein the p fixed strips comprise a first fixed strip to a fourth fixed strip (11, 12, 13, 14), wherein the first fixed strip, the second fixed strip, and the fourth fixed strip are respectively connected to first input end, second input end, and third input end, and an end of the third fixed strip acts as one of the K second ports; and the q movable strips comprise a first movable strip to a third movable strip (21, 22, 23); and wherein the q movable strips are selectively connected to the p fixed strips is specifically: the first movable strip is connected to the first fixed strip and the third fixed strip in a first operating mode set by the switching switch; and the second movable strip is connected to the first fixed strip and the second fixed strip, and the third movable strip is connected to the third fixed strip and the fourth fixed strip in a second operating mode set by the switching switch. the first movable strip is connected to the first fixed strip and the third fixed strip in a first operating mode set by the switching switch; and the second movable strip is connected to the first fixed strip and the second fixed strip, and the third movable strip is connected to the third fixed strip and the fourth fixed strip in a second operating mode set by the switching switch.