www.radartutorial.eu www.radartutorial.eu Card Index of Radar Sets - Ancient Radars


Description of the radar set, tactical-technical characteristics Описание; Основные тактико-технические характеристики (Базы данных)

Figure 1: Bendix AN/FPS-20 Radar

frequency: 1250-1350 MHz
pulse repetition time (PRT): 2858 µs
pulse repetition frequency (PRF): 350 Hz
pulsewidth (τ): 2 µs
receive time:  
dead time:  
peak power: 2 … 2.5 MW
average power: 4.35 … 6 KW
instrumented range: 231 NM
range resolution: 1000 Yard
beamwidth: 1.3°
hits per scan:  
antenna rotation: 3.3, 5 or 10 rpm


The AN/FPS-20 was a widely used L–Band early warning and ground-controlled interception radar system, developed by Bendix orporation. The radar family started with the AN/FPS-3 in 1950, used a transmitter with two magnetrons.

The production of AN/FPS-20 began in 1956 with a dual-channel liquid-cooled klystron transmitter. Each receiver used the “Dicke Fix”- processing. The antenna was equipped with a polarizer and could work alternating in circular or linear horizontal polarization.

Later updates (including anti-jamming opportunities mostly) led to the designations AN/FPS-64, AN/FPS-65, AN/FPS-66, AN/FPS-67, AN/FPS-91, AN/FPS-93, AN/FPS-100, AN/FPS-113, AN/GPS-4, and AN/FPS-508.