A sensor array includes a housing with a circumferential housing wall, which defines a housing opening, with a sensor circuit board with a high-frequency sensor. The sensor circuit board in the housing is arranged such that the high-frequency sensor is directed towards the housing opening. A one-piece closing cap closes the housing. The one-piece closing cap has a circumferential cap wall and a high-frequency lens. The high-frequency lens closes the circumferential cap wall on the front side and is directed towards the housing opening. A distance between the high-frequency lens and the high-frequency sensor and thus a focal length is predefined by a lateral length of the cap wall.