HENSOLDT Radar Systems: AESA Technology, Frequency Bands and TwInvis Passive Radar
HENSOLDT’s radar portfolio spans active AESA military radars, passive surveillance systems, civil ATC, and naval radars — covering nearly every segment of modern radar technology. Understanding the underlying architecture explains why these systems perform at the level they do.
AESA: The Core Architecture
Most of HENSOLDT’s premium military radars are built on AESA (Active Electronically Scanned Array) technology. Steering the beam electronically rather than mechanically eliminates moving parts, dramatically accelerates scan rates, and enables simultaneous multi-target tracking — critical for drone swarm and ballistic missile defense scenarios.
Frequency Bands and Applications
HENSOLDT systems span multiple bands: C-band (TRML-4D — long range, fine resolution), S-band (ASR-NG airport surveillance — range-resolution balance), X-band (Kelvin Hughes SharpEye — coastal and naval, high resolution), and L-band (IFF/secondary surveillance systems like MSSR 2000 I).
TwInvis: The Passive Radar Differentiator
TwInvis is arguably HENSOLDT’s most distinctive radar: it emits no signal of its own, instead exploiting existing FM and digital TV broadcasts to detect targets. A jammer cannot blind TwInvis because there is no HENSOLDT signal to suppress. Stealthy aircraft optimized to reduce active radar cross-section still struggle to suppress reflections of external signals — giving TwInvis a meaningful capability edge in contested electromagnetic environments.
Sources
hensoldt.net · IEEE Aerospace and Electronic Systems · Jane’s Radar and Electronic Warfare Systems
