AN/SPS-39
              < AN 
          | AN/SPS-39 aboard a USS Atlanta | |
| Country of origin | United States | 
|---|---|
| Manufacturer | Hughes Aircraft Company | 
| Introduced | 1960 | 
| No. built | 89 | 
| Type | 3D | 
| Frequency | S Band | 
| PRF | 1850 Hz | 
| Beamwidth | 1.1° × 2.25° | 
| Pulsewidth | 4 µs | 
| Range | 296 km (160 nmi) | 
| Azimuth | Unlimited | 
| Power | 1 MW | 
AN/SPS-39 is a three-dimensional radar was manufactured by Hughes Aircraft Company. It was used by the US Navy as a parabolic-cylinder reflector antenna after World War II, and was equipped aboard naval ships during the Cold War. It was mass-produced based on AN/SPS-26, and was also the first 3D radar deployed by the US Navy in the fleet. It later evolved into an improved AN/SPS-52.
In accordance with the Joint Electronics Type Designation System (JETDS), the "AN/SPS-39" designation represents the 39th design of an Army-Navy electronic device for surface ship search radar system. The JETDS system also now is used to name all Department of Defense electronic systems.