AN/APS-134

The AN/APS-134 “SeaVue” is an X-band (9.5-10 GHz) fully coherent search radar, derived from the AN/APS-116 and intended for international sales. Designed for Antisubmarine Warfare (ASW), it detects submarine periscopes and antennas in rough seas, and can use Inverse Synthetic Aperture Radar (ISAR) processing to identify surface-ship targets. The system, with its 2.4° beamwidth antenna rotating at 6 to 150 rpm, is integrated with the aircraft’s data systems, and its scanner is mounted in a nose radome. For navigation and surface search, operators can select a high scan rate and a pulse repetition frequency (PRF) of 2000 Hz with pulse compression (τ=2.5 ns) for high resolution, or a slower scan rate, a PRF of 500 Hz, and frequency agility for long-range search. The transmitter employs a traveling wave tube (TWT) as a final amplifier stage, delivering a peak power of 500 kW and an average power of 500 W, achieving an instrumented range of 275 km (150 NM) with a range resolution of 0.46 m (1.5 ft), through a vertically polarized, heart-shaped parabolic dish antenna with a feed horn and pressurized waveguide.

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