An antenna, wherein the antenna is configured to be disposed on an insulation medium of a circuit board, and the antenna comprises a loop radiator, a signal feed-in part, a first conductive ground structure, and a second conductive ground structure, wherein a first end of the loop radiator is connected to the first conductive ground structure, a second end of the loop radiator is connected to the signal feed-in part, and the loop radiator is configured to independently generate a first radiation signal based on a function of a current, wherein the radiation direction of the first radiation signal is perpendicular to a horizontal plane; the loop radiator and the second conductive ground structure form a groove, the loop radiator and the second conductive ground structure are configured to jointly generate a second radiation signal in an opening direction of the groove based on a function of a current such that a radiation direction of the first radiation signal is different from a radiation direction of the second radiation signal; and all of the signal feed-in part, the first conductive ground structure, and the second conductive ground structure are connectable to a radio frequency circuit of the circuit board; wherein the loop radiator comprises a first radiator, a second radiator, and a third radiator, wherein a first end of the first radiator is connected to the first conductive ground structure, a second end of the first radiator is connected to a first end of the second radiator, a second end of the second radiator is connected to a first end of the third radiator, and a second end of the third radiator is connected to the signal feed-in part; the second radiator is configured to independently generate the first radiation signal based on the function of the current, such that the radiation direction of the first radiation signal is perpendicular to the second radiator; and the third radiator and the second conductive ground structure are configured to jointly form the groove whose opening is outward, such that the third radiator and the second conductive ground structure jointly generate the second radiation signal in the opening direction of the groove based on the function of the current; wherein the antenna further comprises at least one horizontal radiator, wherein the at least one horizontal radiator is disposed on a side surface of the second radiator, the at least one horizontal radiator and the second radiator are configured to jointly generate a third radiation signal based on a function of a current, such that a radiation direction of the third radiation signal is the same as the radiation direction of the first radiation signal, and radiant intensity of the third radiation signal is greater than radiant intensity of the first radiation signal. a first end of the loop radiator is connected to the first conductive ground structure, a second end of the loop radiator is connected to the signal feed-in part, and the loop radiator is configured to independently generate a first radiation signal based on a function of a current, wherein the radiation direction of the first radiation signal is perpendicular to a horizontal plane; the loop radiator and the second conductive ground structure form a groove, the loop radiator and the second conductive ground structure are configured to jointly generate a second radiation signal in an opening direction of the groove based on a function of a current such that a radiation direction of the first radiation signal is different from a radiation direction of the second radiation signal; and all of the signal feed-in part, the first conductive ground structure, and the second conductive ground structure are connectable to a radio frequency circuit of the circuit board; wherein the loop radiator comprises a first radiator, a second radiator, and a third radiator, wherein a first end of the first radiator is connected to the first conductive ground structure, a second end of the first radiator is connected to a first end of the second radiator, a second end of the second radiator is connected to a first end of the third radiator, and a second end of the third radiator is connected to the signal feed-in part; the second radiator is configured to independently generate the first radiation signal based on the function of the current, such that the radiation direction of the first radiation signal is perpendicular to the second radiator; and the third radiator and the second conductive ground structure are configured to jointly form the groove whose opening is outward, such that the third radiator and the second conductive ground structure jointly generate the second radiation signal in the opening direction of the groove based on the function of the current; wherein the antenna further comprises at least one horizontal radiator, wherein the at least one horizontal radiator is disposed on a side surface of the second radiator, the at least one horizontal radiator and the second radiator are configured to jointly generate a third radiation signal based on a function of a current, such that a radiation direction of the third radiation signal is the same as the radiation direction of the first radiation signal, and radiant intensity of the third radiation signal is greater than radiant intensity of the first radiation signal.