AN/SPS-40
File:USS Trenton (LPD-14) SPS-40 antenna.jpg
AN/SPS-40 on USS Trenton (LPD-14)
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Country of origin | United States |
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Introduced | 1960s |
Type | 2D Air-search |
Frequency | 400 - 450 MHz, UHF band |
Range | 250 nM |
Diameter | 140" x 214" |
Azimuth | 0-360° |
Elevation | Vertical beam width 19° |
Precision | Horiz. beam width 10.5° |
The AN/SPS-40 is a United States Navy two-dimensional, long range air search radar that is capable of providing contact bearing and range. It was used on Perth-class destroyers, Charles F. Adams-class destroyers, Spruance-class destroyers, Belknap-class cruisers, Leahy-class cruisers, Knox-class frigates, Bronstein-class frigates, Hamilton-class cutters, Raleigh-class amphibious transport docks and many other ship classes. Its "basket" antenna with the over-the-top feed line was a familiar sight throughout the Navy even into the early '80s. It was replaced by the AN/SPS-49 on newer ships and on ships that received the New Threat Upgrade.
The SPS-40, being a vacuum tube design, was notoriously sensitive to the vibration from shipboard gunfire. A later redesign into a largely solid-state system not only improved its performance (cutting the number of cabinets by more than half) also featured one of the best MTI (Moving Target Indicator) units in the fleet - a rarity in the early 1970s.
Gallery
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USS Raleigh (LPD-1) SPS-40 radar.jpg
AN/SPS-40 antenna on USS Raleigh (LPD-1)
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USS Raleigh (LPD-1) SPS-40 radar 2.jpg
Another view of the same antenna on Raleigh
See also
External links
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