AMDR-S: Digital Array Radar

Lockheed Martin's AMDR-S: The AMDR (Air and Missile Defense Radar)

Lockheed Martin's AMDR-S solution will enable significantly improved simultaneous multi-mission operations in stressing environments, balanced with affordable lifecycle costs. The Lockheed Martin team is developing an open-architecture and modular design matured through significant corporate and U.S. Navy investment.

The S band is part of the microwave band of the electromagnetic spectrum. It is defined by an IEEE standard for radio waves with frequencies that range from 2 to 4 GHz, crossing the conventional boundary between UHF and SHF at 3.0 GHz. The S band is used by weather radar, surface ship radar, and some communications satellites, especially those used by NASA to communicate with the Space Shuttle and the International Space Station. The 10-cm radar short-band ranges roughly from 1.55 to 5.2 GHz.

S band is also used in optical communications to refer to the wavelength range 1460 nm to 1530 nm.

Northrop Grumman's AMDR features:

    Design flexibility for easy and cost-effective adaptation to current and future Navy ships and multiple-platform installations.
    Multiple-mission capability resulting from incorporating a sub-array design and unique digital beam former.
    Modularity and scalability that’s built in to both hardware and software designs.
    Low-cost, low-risk upgrade capabilities.
    Simple and efficient maintenance scheme.
    Open architecture that applies to virtually all hardware and software components to significantly reduce risk and cost.
    Open business model to deliver dramatic cost savings to the Navy  now, and for many generations to come.

Sources:

http://www.lockheedmartin.com/us/products/amdr.html
http://www.northropgrumman.com/Capabilities/AMDR/Pages/default.aspx