AN/ALQ-135


The AN/ALQ-135 is an internally-mounted electronic countermeasure jamming system produced by Northrop Grumman for the Tactical Electronic Warfare Suite on F-15 Eagle and F-15 variant aircraft. The system can jam and track multiple anti-aircraft missiles in addition to other threats. During the Gulf War, the AN/ALQ-135 logged more than 6,600 hours of combat, yet no aircraft were lost to a threat the system protects against.
The Tactical Electronic Warfare Suite was a fully integrated self-protection system to defeat threats to the F-15 aircraft. Integrated systems working in conjunction with the ALQ-135 were the AN/ALQ-56 radar warning receiver, AN/ALQ-128 Electronic Warfare Warning Set and AN/ALE-45 chaff and flare dispenser.
In accordance with the Joint Electronics Type Designation System, the "AN/ALQ-135" designation represents the 135th design of an Army-Navy airborne electronic device for special countermeasures equipment. The JETDS system is also now used to name all Department of Defense and some NATO electronic systems.

Development

Since the 1970s, the ALQ-135 system has been a component of F-15 aircraft. The system has been continually upgraded with modifications to the processor, durability upgrades, and weight reduction. The system was installed on more than 500 F-15s. The band 3 system was first installed in 1988 while the band 1.5 system was first installed aboard F-15s in 2000.
During the late 2010s, the ALQ-135 was to be replaced by the AN/ALQ-250 Eagle Passive/Active Warning and Sustainment System.

Description

The modern system consists of five components of band 1.5 and band 3 equipment to cover the full spectrum of threats between with B1.5 covering lower frequencies and B3 the higher frequencies. Specifically, B1.5 covers and B3 covers.
The AN/ALQ-135 system consists of the B3 RF Amplifier, B3 Control/Oscillator, B1.5 RF Amplifier, B1.5 Control/Oscillator, and the LRU-14. The band 1.5 and band 3 equipment share 70% of their hardware. This means that logistics and maintenance are more easily performed. The band 1.5 and band 3 systems can jam both high band and low band threats.
ComponentWeightVolumeDimensions
B3 RF Amplifier
B3 Control/Oscillator
B1.5 RF Amplifier
B1.5 Control/Oscillator
LRU-14

Variants