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S 711

Description of the radar set, tactical-technical characteristics

Figure 1: S 711

S 706 Radar, © 1972 Marconi

Figure 1: S 711

Specifications
frequency: 3 ± 0.15 GHz
(S-Band)
pulse repetition time (PRT):
pulse repetition frequency (PRF): 1 000 Hz
pulsewidth (τ): 12.5 µs
receive time:
dead time:
peak power: 160 kW
average power: 2 kW
instrumented range: 64 NM (≙ 118 km)
range resolution: 250 m
accuracy:
beamwidth: 1.5°
hits per scan:
antenna rotation: 15 min⁻¹
MTBCF:
MTTR:

S 711

S 711 was a special surveillance radar operating in S-Band developed by Marconi. It was designed as a gap filler and radar at a special distributed site against low-flying aircrafts.

The antenna was a single curved parabolic reflector antenna mounted on a mast in a height of 12 or 19 meters. The antenna performs a cosecant squared pattern by the illumination of the reflector with two hornfeeds. The transmitted electrical field was linear vertical or circular polarized. The receiver's pulse compression gain was 20-fold, the compressed pulse width was 0.625 µs. The radar used the same operator shelter as the S 706 radar.

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