Abstract: The invention relates to a system for estimating the agricultural yield of a cultivated plot comprising a plurality of crops, the system comprising: —a radar unit (1) having: —a radar (11) configured to acquire at least one image of the cultivated plot, said radar operating in the field of frequency-modulated continuous waves; —a focusing unit (12) configured to focus a radar beam in an acquisition direction; a processing unit (2) configured to carry out steps of: acquiring (E1), for each position of the radar; processing (E2) the acquired image to extract therefrom at least one data item representative of the yield of the cultivated plot; determining (E3) the yield of the cultivated crop on the basis of the extracted data.

Abstract: The invention relates to a helix antenna comprising a plurality of radiating elements wound helically in an axisymmetric shape (15), characterized in that each radiating element comprises a repetition of the same pattern, which is defined by an at least second-order fractal (F1, F1? F2, F2?, F3, F3?, F4, F5).