Radiofrequency module

A radiofrequency module, comprising:

• a first layer comprising an array of radiating elements, each radiating element having a cross section for supporting at least one wave propagation mode,
• a second layer forming an array of waveguides;
• a fourth layer forming an array of ports;
• the second layer being interposed between the first and the fourth layer;
• each waveguide being intended to transmit a radiofrequency signal in one or other direction between a port of the fourth layer and a radiating element of the first layer;
• the surface area of the first layer being different from the surface area of the fourth layer;
• the waveguides approaching one another between the fourth layer and the first layer, or between the first layer and the fourth layer,
• the array of radiating elements of the first layer forming a two-dimensional array in a first plane;
• the array of ports of the fourth layer forming a two-dimensional array in a second plane, and
• each cross section of the first layer being provided with three ridges parallel to the direction of propagation of the signal,
• wherein the three ridges being spaced apart with an angular distance of 120°.