radar slotSlot Back [N-001 Mech] - (Su-27P1M, Su-27S1M, Su-27UB1M) Radar Role: Radar, FCR, Air-to-Air, Medium-Range Max Range: 166.7 kmSlot antennas are an about λ2 elongated slot, cut in a conductive plate (Consider an infinite conducting sheet), and excited in the center. This slot behaves according to Babinet’s principle