SBX-1

The SBX-1 is a floating, self-propelled, mobile early warning radar station operating in the X-band (IEEE designation) or I-band (NATO designation). Manufactured by Raytheon E-Systems as part of the US Missile Defense Agency's Ballistic Missile Defense System, it was developed for use in strong winds and heavy seas, with its platform designed by Boeing. The radar features an active phased array antenna with a 384 m² aperture, equipped with 22,000 to 69,632 transmit/receive (Tx/Rx) modules, typically around 45,000. Each Tx/Rx module includes two horn radiators, one for the main antenna and an auxiliary antenna for different polarization reception. The octagonal antenna plate can rotate ±270° and tilt from 0 to 85°, all housed within a soft radome maintained by atmospheric overpressure. With a peak power of 133 kW and an instrumented range of 4,800 nautical miles (8,900 km), the SBX-1 was deployed in 2006.

radartutorial.eu: https://www.radartutorial.eu/19.kartei/01.oth/karte042.en.html