TRML-4D RADAR

The TRML (German: Telefunken Radar Mobil Luftraumüberwachung, or "Telefunken mobile airspace surveilance radar") is a family of air defense radars first developed by Telefunken and currently produced by Hensoldt. It is a development of the earlier TRMS (German: Telefunken Radar Mobil Such or "Telefunken mobile search radar").

Retractable mast versions are TRML-2D with a rotating parabolic antenna and TRML-3D with a rotating phased array antenna, designated as Nahbereichsradar (NBR) or "short range radar" by the Bundeswehr. The latest TRML-4D comes with non-retractable, rotating base active electronically scanned array (AESA) solid-state antenna.
The latest variant of the radar was presented by Hensoldt at the Eurosatory in 2018. It will be delivered to customers in 2020.

The radar unit includes a completely redesigned AESA antenna with solid-state GaN elements, mounted on a non-retractable continuously rotating base. The system does not include an integrated operator shelter anymore, so a separate module is needed. TRML-4D combines digital beamforming with pulse-Doppler radar to detect difficult-to-locate airborne targets such as hovering helicopters or low-flying cruise missiles. The system has increased performance compared to its predecessors and is able to track 1500 targets at a range of up to 250 km. It supports Mode 5 and Mode S identification. The radar unit includes an onboard power generator and can be carried by any truck that has standard 20 ft (6.1 m) ISO container fittings.Instrumented range is 250 km, can track fighter type targets more than 120 km away.

The IRIS-T SLS, SLM and SLX use primarily the TRML-4D as fire control radar