30N6E "Flap Lid" B Tracking and Engagement Phased Array Radar

uploaded by: =rk= on May 23, 2013

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"The first generation of the S-300P's 5N63 (later 30N6) Flap Lid A engagement/fire control radar was also innovative, and clearly influenced by the Raytheon MPQ-53 engagement radar for the MIM-104 Patriot. The Flap Lid, like the MPQ-53, uses a 10,000 element transmissive passive shifter technology phased array, with a space (a.k.a. optical) feed into the rear plane of the antenna, using a microwave lens feed and a complex monopulse horn arrangement. The Flap Lid's antenna stows flat on the roof of the radar cabin, which was initially deployed on a trailer towed by a Ural-357, KrAZ-255 or KrAZ-260 6x6 tractor. The whole radar cabin is mounted on a turntable and used to slew the phased array to cover a 60 degree sector of interest." - and - "Conventional unstealthy, or partially stealthy combat aircraft will have difficulty surviving within the coverage of the S-300P/S-300V systems - the high transmit power, large radar and missile seeker apertures, low sidelobes, generous use of monopulse angle tracking and extensive ECCM features make these systems difficult to jam effectively. Self protection jammers will need to produce relatively high X-band power output, and exploit monopulse angle tracking deception techniques - Digital RF Memory techniques with high signal fidelity are nearly essential. Even so the challenges in defeating these systems with a self protection jammer are not trivial - raw power-aperture does matter in this game." huh

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