A remote electrical tilt antenna (200, 500), comprising at least one remote electrical tilt unit (210, 510), wherein the at least one remote electrical tilt unit (210, 510) comprises: a remote control unit, RCU (211, 511), wherein the RCU (211, 511) is connected to a gear (212, 512) and is configured to receive a drive instruction, wherein the drive instruction is used to instruct the RCU (211, 511) to perform driving, and the RCU (211, 511) is further configured to drive the gear; the gear (212, 512), wherein the gear is connected to a phase shifter (213, 513), the gear (212, 512) is driven by the RCU (211, 511), and the gear, driven by the RCU (211, 511), is configured to drive the phase shifter (213, 513); and the phase shifter, wherein the phase shifter is configured to adjust a direction of an antenna beam, characterized in that a mismatching device (214, 300, 400) is built in the phase shifter, wherein the mismatching device (214, 300, 400) is associated with a radio frequency, RF, channel, and the mismatching device (214, 300, 400) is configured to enable the RF channel to generate impedance mismatch, so as to cause a standing wave exception on the RF channel and enable a base station to find, by scanning, an RF port on which the standing wave exception appears, or the gear is further configured to trigger a mismatching device that is connected to a radio frequency, RF, channel, and the mismatching device (514, 300, 400) is configured to enable the RF channel to generate impedance mismatch, so as to cause a standing wave exception on the RF channel and enable a base station to find, by scanning, an RF port on which the standing wave exception appears, wherein the phase shifter (213, 513) further comprises a moving slider, wherein at least one trigger apparatus is disposed on the moving slider, the at least one trigger apparatus moves along with the moving slider, and the at least one trigger apparatus is configured to trigger the mismatching device (214, 514, 300, 400) to enable the RF channel to generate impedance mismatch and wherein the at least one trigger apparatus is a metal spring plate, wherein the metal spring plate is disposed at an end of the moving slider, and when the moving slider is at a maximum stroke position, the metal spring plate comes into contact with the mismatching device (214, 514, 300, 400), or the at least one trigger apparatus is a copper foil, wherein the copper foil is disposed at an end of the moving slider, and when the moving slider is at a maximum stroke position, the copper foil comes into contact with the mismatching device (214, 514, 300, 400). a remote control unit, RCU (211, 511), wherein the RCU (211, 511) is connected to a gear (212, 512) and is configured to receive a drive instruction, wherein the drive instruction is used to instruct the RCU (211, 511) to perform driving, and the RCU (211, 511) is further configured to drive the gear; the gear (212, 512), wherein the gear is connected to a phase shifter (213, 513), the gear (212, 512) is driven by the RCU (211, 511), and the gear, driven by the RCU (211, 511), is configured to drive the phase shifter (213, 513); and the phase shifter, wherein the phase shifter is configured to adjust a direction of an antenna beam, characterized in that a mismatching device (214, 300, 400) is built in the phase shifter, wherein the mismatching device (214, 300, 400) is associated with a radio frequency, RF, channel, and the mismatching device (214, 300, 400) is configured to enable the RF channel to generate impedance mismatch, so as to cause a standing wave exception on the RF channel and enable a base station to find, by scanning, an RF port on which the standing wave exception appears, or the gear is further configured to trigger a mismatching device that is connected to a radio frequency, RF, channel, and the mismatching device (514, 300, 400) is configured to enable the RF channel to generate impedance mismatch, so as to cause a standing wave exception on the RF channel and enable a base station to find, by scanning, an RF port on which the standing wave exception appears, wherein the phase shifter (213, 513) further comprises a moving slider, wherein at least one trigger apparatus is disposed on the moving slider, the at least one trigger apparatus moves along with the moving slider, and the at least one trigger apparatus is configured to trigger the mismatching device (214, 514, 300, 400) to enable the RF channel to generate impedance mismatch and wherein the at least one trigger apparatus is a metal spring plate, wherein the metal spring plate is disposed at an end of the moving slider, and when the moving slider is at a maximum stroke position, the metal spring plate comes into contact with the mismatching device (214, 514, 300, 400), or the at least one trigger apparatus is a copper foil, wherein the copper foil is disposed at an end of the moving slider, and when the moving slider is at a maximum stroke position, the copper foil comes into contact with the mismatching device (214, 514, 300, 400).