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| AN/CPS-6B | |
|---|---|
| Name | AN/CPS-6B |
| Country | United States |
| Introduced | 1950s |
| Manufacturer | General Electric |
| Type | Medium-range search radar |
| Frequency | S-band |
| Range | ~200 miles |
| Azimuth | 360° |
AN/CPS-6B The AN/CPS-6B was a United States Air Force radar system developed during the early Cold War era, designed for long-range aircraft detection and control during the Korean War and early Cold War air defense build-up. It was produced by General Electric following designs influenced by work at MIT Radiation Laboratory, and it served alongside contemporaries such as the AN/FPS-3, AN/TPS-1, and SAGE-era systems in networks that included Air Defense Command, Continental Air Defense Command, and allied installations in NATO countries.
The design lineage of the AN/CPS-6B traces to research programs at the MIT Radiation Laboratory, engineering teams at General Electric, and procurement directives from United States Air Force planners who coordinated with Bell Labs and contractors under Department of Defense guidance. Early prototypes were informed by advances demonstrated during World War II by projects tied to the British Chain Home network and the Project Cadillac experiments. The radar incorporated lessons from Project ROTOR assessments and featured antenna and transmitter developments paralleling those used by Northrop and Raytheon in contemporaneous systems. Program management involved liaison with ARPA predecessors and operational feedback from units based at Wright-Patterson Air Force Base and Wheeler Field.
The AN/CPS-6B operated in the S-band frequency range using a pulsed magnetron transmitter patterned after units documented in MIT Radiation Laboratory Series publications; its wavelength choices paralleled those in the AN/FPS-20 family. The system used rotating parabolic antennas with beamforming concepts similar to those tested by Bell Labs and featured a display and plotting arrangement influenced by Project Whirlwind and early SAGE consoles. Power amplification stages employed vacuum tube technologies also used by General Electric for the B-36 radar suites. Performance metrics were compared with AN/FPS-6 height-finder radars and with RCA transceiver developments in range, resolution, and detection probability. Cooling and stabilization systems echoed designs from Douglas Aircraft Company avionics programs.
Deployed in the early 1950s, the AN/CPS-6B entered service with units assigned to Air Defense Command and supported intercept operations coordinated with North American Aerospace Defense Command planning as the Cold War intensified. Fielded in the Korean theater and continental sites, it operated alongside interceptors like the F-86 Sabre and command systems that later interfaced with SAGE. Crews trained under curricula developed at Keesler Air Force Base and Lowry Air Force Base, and maintenance practices reflected standards from Wright-Patterson Air Force Base logistics. The radar participated in exercises with NATO partners, including stations in England, Germany, and Iceland, and was evaluated in joint trials with aircraft from Royal Air Force and Royal Canadian Air Force units.
The baseline AN/CPS-6 was iterated into the AN/CPS-6B through modifications by General Electric engineers drawing on feedback from operators in Pacific Air Forces and Air Defense Command. Modifications included transmitter upgrades influenced by RCA research, antenna refinements paralleling Hughes Aircraft Company developments, and integration efforts with command systems akin to Lincoln Laboratory prototypes. Field modifications employed spare parts common to the AN/FPS-3 and AN/FPS-6 families, and later retrofit kits were designed referencing standards used by Curtiss-Wright and Westinghouse electronics divisions.
AN/CPS-6B units were sited at permanent and mobile stations across the continental United States, deployed to forward bases in Korea during the Korean War, and installed at NATO airfields in West Germany and the United Kingdom. Units fell under command structures including 27th Air Division, 31st Air Division, and regional sectors coordinated by Eastern Air Defense Force and Western Air Defense Force. Crew assignments involved radar operators trained at Keesler Air Force Base and maintenance teams drawn from squadrons at Hamilton Air Force Base and McChord Field.
The AN/CPS-6B influenced subsequent radar architecture and procurement, contributing engineering data to projects run by MIT Lincoln Laboratory, Air Force Cambridge Research Laboratories, and ARPA initiatives that led to the SAGE network and later AWACS concepts. Technologies matured in its development fed into radar lessons adopted by manufacturers such as Raytheon, Northrop Grumman, and Lockheed Martin, and its operational record informed doctrine used by Air Defense Command and NATO air planners. Surplus components supported training at institutions like Embry-Riddle Aeronautical University and industrial museums preserving Cold War avionics histories in locations such as Wright-Patterson Air Force Museum.
Category:Cold War radar systems Category:United States Air Force radar systems