CEMExpert is a software dedicated to the prediction of radar cross-section of aerial and naval targets. The software uses both the high-frequency asymptotic method (PO-PTD) as well as the full-wave equation solver (FVTD). A quick calculation is made possible by automated meshing, scripts for azimuthal scan and parallel processing. The software has been used for improving stealth performance of UAVs, for shape optimization of naval ships and RCS characterization of target missiles.

Aerial and Naval RCS Prediction

Automated Meshing

Azimuthal Scan

Shape Optimization

RCS Characterization

RCS Reduction

Radio waves suffer much less attenuation than visible light. Radar transmission reaches much farther and hence used for the detection of targets. Radar Cross Section (RCS) is the measure of how detectable a target object is by radar. The RCS of an object is influenced by several factors. These factors include material of construction, size of the object, and shape of the object. Typical RCS values for a bird is 0.01 sqm, for a human is 1 sqm., b. Combat aircraft are 10 sqm., c. ships are 1,000 sqm.  Radar can clock the time to send and receive electromagnetic energy and hence not only detection, but ranging is also possible.

Metallic or conduction surfaces, when illuminated by a radar beam generates a sympathetic electromagnetic field on them. Thus, the illuminated surface becomes and acts as an antenna. This electromagnetic wave propagation & reflection are solved using Maxwell's equations. These equations are solved using the full-wave solvers. Different types of full-wave solvers are a. Method of Moments (MoM) b. Finite Element Method (FEM) and c. Finite Difference Time Domain (FDTD). Another method for RCS prediction of electrically large objects is Geometric Optics (GO). GO assumes a high-frequency limit with wavelength tending to zero. Physical Optics (PO) models scattering by classical ray-tracing technique & involved low-frequency scattering technique.