AN/SPS-49

It formerly served in a complementary role aboard Aegis cruisers with the AN/SPY-1 but the systems are currently being removed during routine upgrade with no replacement.

First tested in 1965 aboard USS Gyatt and introduced in 1975, the AN/SPS-49 operates in the 851–942 MHz, or L-, band and has a range of 256 nautical miles (474 km).

The orange-peel parabolic shape of the antenna creates a narrow 3.3°-beam to reduce the probability of detection or jamming.

[1] Default is at 12 rpm for the AN/SPS-49A(V)1, to provide more frequent scans against incoming missiles.

The output stage of the transmitter in all variants uses a two-cavity klystron amplifier.

The AN/SPS-49 is part of the combat systems of the Oliver Hazard Perry -class frigate.
Antenna of an AN/SPS-49(V)8 ANZ radar system on a Royal Australian Navy ANZAC class frigate. The AS-177B/UPX antenna fitted to the rear of the reflector functions as a back-fill radiator for the AS-4328/U IFF interrogator antenna.