A cavity slotted-waveguide antenna array comprising: a housing; an array of waveguide columns disposed in parallel in a predetermined adjacent position with respect to one another in the housing, which housing has a front side and a rear side with several of the waveguide columns being provided with a plurality of cavity slots on the front side of said housing, said waveguide columns having upper and lower ends, and said waveguide columns being waveguides with a rectangular cross section, with each or at least part of the columns being defined by two opposing wide inner surfaces, a narrow inner back surface, and a narrow inner front surface, with the plurality of cavity slots extending from the front side of the housing to said narrow inner front surface, and wherein each or at least part of waveguide columns has a probe hole formed in a waveguide bottom wall being defined by the narrow inner back surface of the waveguide column and the rear side of the housing with an outer back surface of the waveguide bottom wall being defined by the rear side of the housing; wherein the cavity slotted-waveguide antenna array further comprises an enclosure part, surrounding parts, signal probes and probe connection parts; wherein the enclosure part holds a number of the surrounding parts corresponding to the number of probe holes, each surrounding part has an outer diameter substantially equal to an inner diameter of the probe holes, each surrounding part holds a probe connection part of a signal probe, which signal probe is a loop probe having a loop or open ended loop extending outwards from said surrounding part; and wherein the enclosure part is connected to the rear side of the housing with the surrounding parts extending into the probe holes with the loops or open ended loops further extending into the interior of the waveguide columns. a housing; an array of waveguide columns disposed in parallel in a predetermined adjacent position with respect to one another in the housing, which housing has a front side and a rear side with several of the waveguide columns being provided with a plurality of cavity slots on the front side of said housing, said waveguide columns having upper and lower ends, and said waveguide columns being waveguides with a rectangular cross section, with each or at least part of the columns being defined by two opposing wide inner surfaces, a narrow inner back surface, and a narrow inner front surface, with the plurality of cavity slots extending from the front side of the housing to said narrow inner front surface, and wherein each or at least part of waveguide columns has a probe hole formed in a waveguide bottom wall being defined by the narrow inner back surface of the waveguide column and the rear side of the housing with an outer back surface of the waveguide bottom wall being defined by the rear side of the housing; wherein the cavity slotted-waveguide antenna array further comprises an enclosure part, surrounding parts, signal probes and probe connection parts; wherein the enclosure part holds a number of the surrounding parts corresponding to the number of probe holes, each surrounding part has an outer diameter substantially equal to an inner diameter of the probe holes, each surrounding part holds a probe connection part of a signal probe, which signal probe is a loop probe having a loop or open ended loop extending outwards from said surrounding part; and wherein the enclosure part is connected to the rear side of the housing with the surrounding parts extending into the probe holes with the loops or open ended loops further extending into the interior of the waveguide columns.