AN/APG-77

Common card · No. 418420

The AN/APG-77 is a multifunction X-band, low probability of intercept radar (LPIR) installed aboard the F-22 Raptor fighter aircraft. The radar was designed and initially built by Westinghouse and Texas Instruments, and production continued with their respective successors Northrop Grumman and Raytheon after acquisition. It is a solid-state, Active Electronically Scanned Array (AESA) radar whose design is based on the AN/APG-66/68/80(V) family of fire control radars. Composed of 1,956 transmit/receive modules (TRM), each about the size of a gum stick, it can perform a near-instantaneous beam steering (in the order of tens of nanoseconds). In accordance with the Joint Electronics Type Designation System (JETDS), the "AN/APG-77" designation represents the 77th design of an Army-Navy airborne electronic device for radar fire-control equipment. The JETDS system is also now used to name all Department of Defense and some NATO electronic systems.

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