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Radar Signature Prediction

IDS Prediction services for radar signatures cover RCS assessment and reduction of platforms and components (antennas, details, intakes, …), radar imaging and main scattering centers evaluation, FSS analysis and design, Jet Engine Modulation analysis, Scenario Simulation and Operational Performance evaluation.

RCS assessment and reduction

Radar signature, or Radar Cross Section (RCS) defines the visibility of a target to radar systems. This signature depends on many factors, including the shape and size of the object, the surface materials, the frequency and polarization of the radar. RCS reduction is becoming increasingly important for modern stealth aircrafts because it allows to:

  • minimize aircraft vulnerability
  • increase crew safety
  • increase mission effectiveness
  • generate new defense strategies against enemy lines of attack

IDS Aeronautical Division’s expertise in this field ensures highly professional and reliable consulting services for RCS assessment and reduction.

Radar imaging

Radar imaging is one of the major techniques to analyze and understand the electromagnetic scattering of complex objects and a fundamental tool for a diagnostic analysis of the main scattering centers (hot spots) of a target. When target dimensions are much larger than the wavelength, a radar image allows the spatial localization in range and cross range of the radar returns from the scattering centers.

High Resolution Range Profile (HRRP), 2D/3D radar images, or Hourglass plots can also be exploited as a “fingerprint” to identify and classify the target.

FSS analysis and design

Frequency Selective Surfaces (FSS) are special screens, deployed upon radomes, to strongly reduce the backscattering of an antenna, or an electronic device, and its housing bay.

An FSS is usually band pass, i.e. it allows transmitting of the only frequencies in the normal emitter frequency band of operation, filtering all the other frequencies. FSS radomes can also be switchable: even in-band, they may be “closed” when the emitter is not operating.

The Aeronautical Division can provide consulting services to:

  • design and optimize an FSS screen according to the customer’s requirements;
  • evaluate the electromagnetic effect (transmission and reflection) of an FSS screen on a radome.

Jet Engine Modulation analysis

Jet Engine Modulation (JEM) of radar return is a phenomenon in the radar observation of a jet aircraft. The phenomenon occurs when radars observe a jet aircraft at an aspect angle that allows electromagnetic radiation to be backscattered from rotating blades and the moving part of the compressor of the jet engine. The rotational periodic motion of blades with respect to the aircraft, produces a periodic modulation on the signal scattered from the engine, in terms of both amplitude and phase. The modulation produces some lines in the spectrum (Doppler Spectrum / Doppler shift), which are characteristic of the specific engine, therefore a fingerprint of the aircraft.

Scenario Simulation and Operational Performance evaluation

The radar signature affects the aircraft’s survivability, which also depends on the environment, the threats, the tactics, the aircraft performance (speed, maneuverability …), the aircraft electronic counter measure and support measure and so on.

This analysis is based on the assessment of the RCS and the evaluation of the related Operational Performance. IDS Aeronautical Division can ensure highly professional and reliable consulting services for the simulation of the aircraft on a real operational scenario.