 The intake ramp for rectangular intakes has its equivalent in the inlet cone for circular intakes.Much simpler and lighter alternatives are used on modern aircraft which are not designed for such high speeds.They include the caret compression surface, used in the Boeing F/A-18E/F Super Hornet and Lockheed Martin F-22 Raptor inlets, and the diverterless supersonic inlet used on the Lockheed Martin F-35 Lightning II and Chengdu J-20.