A vehicle comprising: an antenna having different gain characteristics in different operating frequency bands; and a controller configured to: use a mathematical expression that reflects the gain characteristics of the antenna in order to correct reception strengths of a plurality of signals having respective frequencies and carrying identical content; change the operating frequency band of the antenna by adjusting length of a coil included in the antenna based on the reception strengths of the plurality of signals by a switching unit of the antenna; and correct the reception strength of the plurality of signals based on at least one of a first characteristic function and a second characteristic function of the mathematical expression, that indicate the different gain characteristics of the antenna, wherein the controller comprises: the first characteristic function of a gain curve of the antenna when the switching unit is a first position corresponding to a first operating frequency band; and the second characteristic function of a gain curve of the antenna when the switching unit is a second position corresponding to a second operating frequency band, and wherein the controller is further configured to: obtain the content from the signal having a first frequency, among the plurality of signals received by the antenna and carrying identical content, based on whether an output value of the first characteristic function for the received signal having the first frequency is greater than an output value of the second characteristic function for a received signal having a second frequency. an antenna having different gain characteristics in different operating frequency bands; and a controller configured to: use a mathematical expression that reflects the gain characteristics of the antenna in order to correct reception strengths of a plurality of signals having respective frequencies and carrying identical content; change the operating frequency band of the antenna by adjusting length of a coil included in the antenna based on the reception strengths of the plurality of signals by a switching unit of the antenna; and correct the reception strength of the plurality of signals based on at least one of a first characteristic function and a second characteristic function of the mathematical expression, that indicate the different gain characteristics of the antenna, wherein the controller comprises: the first characteristic function of a gain curve of the antenna when the switching unit is a first position corresponding to a first operating frequency band; and the second characteristic function of a gain curve of the antenna when the switching unit is a second position corresponding to a second operating frequency band, and wherein the controller is further configured to: obtain the content from the signal having a first frequency, among the plurality of signals received by the antenna and carrying identical content, based on whether an output value of the first characteristic function for the received signal having the first frequency is greater than an output value of the second characteristic function for a received signal having a second frequency. use a mathematical expression that reflects the gain characteristics of the antenna in order to correct reception strengths of a plurality of signals having respective frequencies and carrying identical content; change the operating frequency band of the antenna by adjusting length of a coil included in the antenna based on the reception strengths of the plurality of signals by a switching unit of the antenna; and correct the reception strength of the plurality of signals based on at least one of a first characteristic function and a second characteristic function of the mathematical expression, that indicate the different gain characteristics of the antenna, wherein the controller comprises: the first characteristic function of a gain curve of the antenna when the switching unit is a first position corresponding to a first operating frequency band; and the second characteristic function of a gain curve of the antenna when the switching unit is a second position corresponding to a second operating frequency band, and wherein the controller is further configured to: obtain the content from the signal having a first frequency, among the plurality of signals received by the antenna and carrying identical content, based on whether an output value of the first characteristic function for the received signal having the first frequency is greater than an output value of the second characteristic function for a received signal having a second frequency. the first characteristic function of a gain curve of the antenna when the switching unit is a first position corresponding to a first operating frequency band; and the second characteristic function of a gain curve of the antenna when the switching unit is a second position corresponding to a second operating frequency band, and wherein the controller is further configured to: obtain the content from the signal having a first frequency, among the plurality of signals received by the antenna and carrying identical content, based on whether an output value of the first characteristic function for the received signal having the first frequency is greater than an output value of the second characteristic function for a received signal having a second frequency.