An antenna apparatus, comprising a radiator of an antenna and a circuit board assembly; wherein the circuit board assembly comprises a first conductive member, and a first board, an elevating board, and a second board sequentially stacked, the first board comprises a first main body portion and a first extension portion connected to the first main body portion, the first main body portion is fixedly connected to the elevating board, the first extension portion protrudes relative to the elevating board and the second board, and is disposed close to the radiator, the first conductive member is fixed to the first extension portion, the first conductive member, the elevating board, and the second board are located on the same side of the first board, and the first conductive member is in elastic contact with the radiator, characterised in that the circuit board assembly further comprises: a first strengthening board, and the first strengthening board is located on one side of the first conductive member, and is fixedly connected to a board surface of the first extension portion facing the second board; and a second strengthening board, and the second strengthening board is located on one side of the first conductive member away from the first strengthening board, and is fixedly connected to the board surface of the first extension portion facing the second board; wherein the first extension portion is provided with a groove, the groove is located between the first strengthening board and the second strengthening board, an opening of the groove is located on a surface of the first extension portion facing the radiator, and a part of the first conductive member is mounted in the groove. the circuit board assembly comprises a first conductive member, and a first board, an elevating board, and a second board sequentially stacked, the first board comprises a first main body portion and a first extension portion connected to the first main body portion, the first main body portion is fixedly connected to the elevating board, the first extension portion protrudes relative to the elevating board and the second board, and is disposed close to the radiator, the first conductive member is fixed to the first extension portion, the first conductive member, the elevating board, and the second board are located on the same side of the first board, and the first conductive member is in elastic contact with the radiator, characterised in that the circuit board assembly further comprises: a first strengthening board, and the first strengthening board is located on one side of the first conductive member, and is fixedly connected to a board surface of the first extension portion facing the second board; and a second strengthening board, and the second strengthening board is located on one side of the first conductive member away from the first strengthening board, and is fixedly connected to the board surface of the first extension portion facing the second board; wherein the first extension portion is provided with a groove, the groove is located between the first strengthening board and the second strengthening board, an opening of the groove is located on a surface of the first extension portion facing the radiator, and a part of the first conductive member is mounted in the groove. a first strengthening board, and the first strengthening board is located on one side of the first conductive member, and is fixedly connected to a board surface of the first extension portion facing the second board; and a second strengthening board, and the second strengthening board is located on one side of the first conductive member away from the first strengthening board, and is fixedly connected to the board surface of the first extension portion facing the second board; wherein the first extension portion is provided with a groove, the groove is located between the first strengthening board and the second strengthening board, an opening of the groove is located on a surface of the first extension portion facing the radiator, and a part of the first conductive member is mounted in the groove.