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Image: Radar antennas on USS Theodore Roosevelt SPS-64

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Radar_antennas_on_USS_Theodore_Roosevelt_SPS-64.jpg ‎(533 × 562 pixels, file size: 157 KB, MIME type: image/jpeg)

Description: AN/SPS-46(V)9 radar antenna on the USS Theodore Roosevelt aircraft carrier. This is an X-band (8-12 GHz) marine navigational radar similar to types on civilian ships, used to detect other ships in the vicinity. It has a peak power of 7 kW, a range of somewhere around 35 nautical miles. This type of antenna is called a slot antenna and radiates a narrow vertical fan-shaped beam of microwaves, about 15° high and 2.2° wide. A motor in the housing below rotates the bar-shaped antenna to scan the beam around the horizon.
Title: Radar antennas on USS Theodore Roosevelt SPS-64
Credit: http://www.navy.mil/view_photos_top.asp
Author: U.S. Navy
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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