A radio-frequency device comprises a printed circuit board and a radio-frequency package having a radio-frequency chip and a radio-frequency radiation element, the radio-frequency package being mounted on the printed circuit board. The radio-frequency device furthermore comprises a waveguide component having a waveguide, wherein the radio-frequency radiation element is configured to radiate transmission signals into the waveguide and/or to receive reception signals via the waveguide. The radio-frequency device furthermore comprises a gap arranged between a first side of the radio-frequency package and a second side of the waveguide component, and a shielding structure, which is configured: to permit a relative movement between the radio-frequency package and the waveguide component in a first direction perpendicular to the first side of the radio-frequency package, and to shield the transmission signals and/or the reception signals in such a way that a propagation of the signals via the gap is attenuated or prevented.