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Bendix AN/FPS-18 Radar

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Title: Bendix AN/FPS-18 Radar  
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Language: English
Subject: Arlington Heights Air Force Station, Equipment of the United States Air Force
Collection: Equipment of the United States Air Force, Ground Radars, Military Radars of the United States
Publisher: World Heritage Encyclopedia

Bendix AN/FPS-18 Radar

Country of origin United States
Type Medium-range search radar

The AN/FPS-18 was a medium-range search Radar used by the United States Air Force Air Defense Command.

This medium-range search radar was designed and built by Bendix as a SAGE system gap-filler radar to provide low-altitude coverage. Operating in the S-band at a frequency between 2700 and 2900 MHz, the AN/FPS-18 could detect at a range of 65 miles.

The system was deployed in the late 1950s and 1960s at unmanned radar facilities (called "Gap Fillers") designed to fill the low-altitude gaps between manned long-range radar stations. Gaps in coverage existed due to the curvature of the earth, mountains, hills, valleys, rivers, and so forth.

The typical unmanned gap-filler radar annex consisted of a small L-shaped cinder-block building, with the radar equipment and the data-transmission equipment in one section and one or more diesel generators in the other section. These unmanned gap-filler sites generally had a three-legged radar tower about 85 feet tall where the AN/FPS-18 Radar was mounted inside a radome.


 This article incorporates public domain material from websites or documents of the Air Force Historical Research Agency.

  • AN/FPS-18 @
  • Winkler, David F. (1997), Searching the skies: the legacy of the United States Cold War defense radar program. Prepared for United States Air Force Headquarters Air Combat Command.
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