Navy2000 wrote:
enclosure above the bridge with three Phased Array panels on it
As I understand it, that's an early rendition and has been cancelled for the initial Flight III ships due to weight and cooling limitations. Instead, the X-band function will be carried out by an improved rotating SPQ-9B on the mast, while the S-Band AMDR (SPY-6) panels on the deckhouse remain outwardly similar to the existing SPY-1:
http://i0.wp.com/news.usni.org/wp-conte ... 24x619.jpgA new X-band radar may indeed be implemented on future sub-variants (Flight IIIA, perhaps?) that'll be similar to the early renderings with the additional enclosure - at least, they say they're working on such an arrangement:
Ronald O'Rourke, Congressional Research Service wrote:
A March 2014 GAO report assessing selected DOD acquisition programs stated:
The X-band portion of AMDR will be comprised of an upgraded version of an existing
rotating radar (SPQ-9B), instead of the new design initially planned. The new radar will
instead be developed as a separate program at a later date and integrated with the
thirteenth AMDR unit. According to the Navy, the upgraded SPQ-9B radar fits better
within the Flight III’s sea frame and expected power and cooling availability. Program
officials state that the SPQ-9B radar will have capabilities equal to the new design for
current anti-air warfare threats, it will not perform as well against future threats
Full report:
https://www.fas.org/sgp/crs/weapons/RL32109.pdf