Add to ORKGInternational audienceA novel pillbox antenna integrating monopulse amplitude comparison technique is presented. The monopulse operation is realized in the antenna scanning plane i.e., E-plane. This enhances the angular resolution in this plane and avoids the mechanical orientation of the antenna. The proposed concept has been validated by a prototype in SIW (Substrate Integrated Waveguide) at 24 GHz. The prototype is currently under measurement. The numerical results show very good performance over an angular sector of ±26° for the Σ and Δ patterns. The SLL is lower than -25dB for the central Σ beam and is around -10dB for the extreme Σ beam position. The antenna gain ranges between 22dBi and 24dBi and the null depth for all the Δ beams is...