An antenna interface for a radio receiver, of the type comprising a socket, designed to be connected to the receiver, and a plug, designed to be connected to the antenna, wherein: - the socket comprises a body and two coaxial distinct cables, each comprising a core, a conductive braid coaxial to the core, and an electric insulator between the core and the braid so as to electrically insulate them, - each coaxial cable extends between a first end, intended to be connected to a printed circuit board of the receiver, and a second end, at which the braid is electrically connected to the body of the socket, and at which the core can be accessed through a respective opening made in the body of the socket, - the plug comprises a body and at least two contactors, such that, when the plug and the socket are connected together, each contactor is arranged opposite an opening such that the core of a respective cable is electrically connected to said contactor, and the braid of each cable is electrically connected to the body of the plug via the body of the socket, characterized in that: - each contactor is a piston contactor, comprising a stationary portion, intended to be connected to a printed circuit board of the antenna, and a moving portion relative to the stationary portion, including a contact element designed to cooperate with a respective core when the socket is connected with the plug, and - the plug comprises a flexible membrane, supporting the contact elements of the piston contactors, and wherein, for each piston contactor: - the stationary portion comprises an electrically insulating hollow cylindrical element, forming a piston body in which the moving part is intended to move axially, - the contact element of the moving part comprises a first guide portion, and a second contact portion designed to cooperate with a respective core when the socket is connected to the plug, and - the first guide portion is generally cylindrical, with a diameter substantially equal to an inner diameter of a hollow cylindrical element, so as to cooperate without play with an inner wall of said hollow cylindrical element, And wherein: - the socket comprises a bottom wall in which the openings are formed, - the plug comprises an end-of-travel stop against which the bottom wall abuts when the socket is connected to the plug, - the end-of-travel stop being provided such that a free space remains between the membrane and the bottom wall when the socket is connected with the plug. - the socket comprises a body and two coaxial distinct cables, each comprising a core, a conductive braid coaxial to the core, and an electric insulator between the core and the braid so as to electrically insulate them, - each coaxial cable extends between a first end, intended to be connected to a printed circuit board of the receiver, and a second end, at which the braid is electrically connected to the body of the socket, and at which the core can be accessed through a respective opening made in the body of the socket, - the plug comprises a body and at least two contactors, such that, when the plug and the socket are connected together, each contactor is arranged opposite an opening such that the core of a respective cable is electrically connected to said contactor, and the braid of each cable is electrically connected to the body of the plug via the body of the socket, - each contactor is a piston contactor, comprising a stationary portion, intended to be connected to a printed circuit board of the antenna, and a moving portion relative to the stationary portion, including a contact element designed to cooperate with a respective core when the socket is connected with the plug, and - the plug comprises a flexible membrane, supporting the contact elements of the piston contactors, - the stationary portion comprises an electrically insulating hollow cylindrical element, forming a piston body in which the moving part is intended to move axially, - the contact element of the moving part comprises a first guide portion, and a second contact portion designed to cooperate with a respective core when the socket is connected to the plug, and - the first guide portion is generally cylindrical, with a diameter substantially equal to an inner diameter of a hollow cylindrical element, so as to cooperate without play with an inner wall of said hollow cylindrical element, - the socket comprises a bottom wall in which the openings are formed, - the plug comprises an end-of-travel stop against which the bottom wall abuts when the socket is connected to the plug, - the end-of-travel stop being provided such that a free space remains between the membrane and the bottom wall when the socket is connected with the plug.