Unlike any previous Aircraft Survivability Equipment (ASE) suite, the AN/ALQ-211

Suite of Integrated RF Countermeasures (SIRFC) broadband
countermeasures set is designed to counter pulse, pulse-Doppler,
continuous-wave and monopulse threats. The passive receiver portion of
the system warns of emitters from C to M band and has the discrimination
to identify threats with better than 90 percent certainty. Typically,
radar-warning receivers look at just two signal parameters to identify
enemy air defenders. By comparison, SIRFC checks 10 parameters to
fingerprint enemy emitters with confidence. Threat characteristics are
stored in the electronic order of battle that is loaded before each
mission, and crews can call up threat data in flight. The SIRFC will
replace the AN/APR-39A(V)1RWR, the AN/ALQ-136(V)1/5 radar jammer and - in its podded form - the AN/ALQ-131
jammer pod and will give added countermeasures against continuous wave
and pulse doppler threats. The total weight for the suite is 97 pounds.


System described


SIRFC consists of three subsystems:

• Advanced Threat Radar Jammer (ATRJ)
  
• Advanced Threat Radar Warning Receiver (ATRWR)
  
• Advanced Airborne Radio Frequency Expendables (AARFE)
  

The SIRFC core consists of an Advanced Threat Radar Warning Receiver
(ATRWR) and the Advanced Threat Radar Jammer (ATRJ). The core
Engineering and Manufacturing Development (EMD) design is comprised of
four components. The Receiver/Processor containing the receiving,
processing, and electronic countermeasures (ECM) generation functions of
the ATRJ. The Remote Transmitter provide the self-protection
transmitting capability of the ATRJ. The Advanced Countermeasures Module
(ACM) provides advanced ECM techniques against a particular class of
weapons. Finally, the Antenna Group which contains the receiver antenna
for reception of microwave and millimeter wave signals and transmit
antenna for transmission of microwave ECM signals.

The system is capable of operating in either an automatic or
manual (command) mode. It provides warning (situational awareness),
active jamming (self protection), and when necessary expendable
countermeasures to defeat threat radar guided weapon systems. Radar
guided air defense artillery threat systems include surface to air
missiles (SAMs) and anti-aircraft artillery (AAA). A Southwest Asia
theater of operations set in 2006 is the basis for threat selection for
the engineering and manufacturing development (EMD) program. Future
integration of SIRFC with the Suite of Integrated InfraRed
CounterMeasures (SIIRCM), in some aircraft which may be equipped with
both systems, is a program objective to optimize multi-spectral threat
countermeasures. Threat systems are not only those originating from
within the Former Soviet Union, but also systems made and proliferated
by the United States, US allies, and other weapons producers.


Versions


AN/ALQ-211(V)1


Integrated in the US ArmyAH-64D Apache.


AN/ALQ-211(V)2


Integrated in the MV-22A Osprey.


AN/ALQ-211(V)3


The variant called ALQ-211(V)3 was selected for the US Army's RAH-66 Comanche attack helicopter. Comanche was cancelled in 2004.


AN/ALQ-211(V)4


This version of the ALQ-211 utilizes advanced wideband and digital
receivers to quickly and accurately detect and identify multiple,
complex emitters when operating in today's high density threat
environment. AIDEWS provides protection against radar based threats
using a highly flexible, programmable technique generator that transmits
deceptive countermeasure signals and coordinates use of chaff and
flares. Standard on export F-16 Block 50/52 and ordered by Chile,
Pakistan, Maroc, Oman, Poland.


AN/ALQ-211(V)5


Norway selected the -211(V)5 variant for its NH90 helicopters.


AN/ALQ-211(V)6


Integrated in the MH-47E Chinook.


AN/ALQ-211(V)7


Integrated in the MH-60R.


AN/ALQ-211(V)8


The AN/ALQ-211(V)8 variant is available for Unmanned Aerial Vehicles
(UAVs) providing ELINT, Electronic Support Measures (ESM) and targeting.


AN/ALQ-211(V)9


Aka Advanced Integrated Defensive Electronic Warfare Suite (AIDEWS).
Pod mounted AN/ALQ-211 jammer with the same aerodynamic and mass
properties as the AN/ALQ-131,
for which it is aimed as a replacement. Unit price approx. $ 3.5
million (including support, spares, documentation). Ordered by Pakistan
for its F-16A/B fleet.

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