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AN/FPS-40

Description of the radar set, tactical-technical characteristics

Figure 1: AN/FPS-40

AN/FPS-40

Figure 1: AN/FPS-40

Specifications
frequency: 9 000 … 9 160 MHz
(X-Band)
pulse repetition time (PRT):
pulse repetition frequency (PRF): 1500 Hz
pulsewidth (τ): 0.18 or 0.6 µs
receive time:
dead time:
peak power: 200 kW
average power:
instrumented range: 40 NM (≙ 74 km)
range resolution:
accuracy:
beamwidth:
hits per scan:
antenna rotation:
MTBCF:
MTTR:

AN/FPS-40

AN/FPS-40, also known as Quadradar Mark Ⅳ, is an operating in X-Band ground controlled precision approach radar (PAR) with IFF capability when used with auxiliary IFF equipment such as Interrogator Set AN/TPX-41. The PAR is used to help aircraft make safe landings when weather conditions are bad and visibility is poor. It is air-transportable by helicopter as an external load.

AN/FPS-40 is an improved (more powerful version of the AN/FPN-36. The transmitter was equipped with a magnetron. The horizontal antenna could also rotate continuously to perform airspace reconnaissance. The vertical antenna then worked as a heightfinder radar.

AN/FPS-40 was used on US-Army airfields since 1950. It was replaced by AN/FPN-67 in 2006.