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Description of the radar set, tactical-technical characteristics

Figure 1: Raytheons AMDR testsite

Figure 1: Raytheons AMDR testsite

frequency: S-Band and X-Band
pulse repetition time (PRT):
depending on software
and configuration
pulse repetition frequency (PRF):
pulsewidth (τ):
receive time:
dead time:
peak power:
average power:
instrumented range:
range resolution:
hits per scan:
antenna rotation:


The AN/SPX-6(V) is a dual frequency band radar operating in S-Band, and X-Band based on Air and Missile Defense Radar (AMDR). The AMDR is the first scalable radar built with Radar Modular Assemblies (RMA). Each RMA is essentially an individual radar with the dimensions of 2ft×2ft×2ft. These RMA building blocks can be combined to form various size arrays to fit the mission requirements of any ship. This common architecture ensures the radar’s extensibility and scalability to other platforms, and their particular mission requirements.

The AN/SPX-6(V) (AMDR) is comprised of 37 RMAs – which is equivalent to AN/SPY-1D(V) +15 dB in terms of sensitivity. It uses digital beamforming architecture and Gallium Nitride technology to detect missile threats over a large range and better distinguish detected objects. It acquire and track a target half the size and at twice the range compared to the AN/SPY-1, providing increased flexibility in ship operating location.

Enterprise Air Surveillance Radar (EASR)

The Enterprise Air Surveillance Radar (EASR) is a derivate of the AMDR and uses the system in a scaled nine-RMA configuration to meet the mission requirements of carriers and amphibious ships. EASR is equivalent to the sensitivity of the current AN/SPY-1D(V) radar on today’s destroyers, and at only 20% of the size of the legacy AN/SPS-48. These are considerable enhancements over the radars in service on current (and future) EASR-designated ship classes. Two variants of EASR will be provided (each face an identical 9-RMA array):

The radar system part operating in S-Band will provide wide-area volume search, target tracking, Ballistic Missile Defense (BMD) discrimination, and missile tracking. Operating in X-Band the radar will provide horizon search, precision tracing, missile communications, and final illumination guidance to targets. It will be available in AMDR sets 13 onward.

AMDR entered low-rate initial production for three AN/SPY-6(V)1 radars in May 2017.

Picture gallery of AMDR

Figure 2: Backside of the test site antenna