Signa simulation results showing (l to r) glider RCS for varied elevations, range profile for a Cessna aircraft, and 3D RCS of a satellite

Signa is advanced radar signature analysis software, providing fast and accurate signature prediction based on asymptotic electromagnetic (EM) analysis. Signa is uniquely suited to handle electrically large, complex targets that cannot be handled efficiently through full wave analysis.

Radar Signature Analysis Software for Electrically Large and Complex Targets

Signa is advanced radar signature analysis software, providing fast and accurate prediction of far-field monostatic radar cross section (RCS) of geometries that are 10s to 1000s of wavelengths in size.

In addition, Signa can generate range profiles and inverse synthetic aperture radar (ISAR) images of targets, useful for identification of significant target scattering features. Signa employs the Shooting and Bouncing Ray (SBR) asymptotic technique to rapidly

and accurately predict the radar signature of electrically large platforms.

SBR Technology LeadersDelcross is a worldwide leader in the SBR technique for electromagnetic simulation and analysis. In recent years, we have advanced the state-of-the-art in SBR technology; adding several new physics models that cannot be found in other commercially available SBR tools.

Intuitive User Workflow Available for Windows or Linux, the Signa graphical user interface (GUI) provides a complete framework with a logical and ordered workflow from model import to analysis output. Problem setup and analysis settings are organized in an intuitive graphical folder tree. After complex RCS data has been generated for a target, it is placed in the Result folder tree for access and review, and can be further post-processed into range profiles or ISAR imagery.

The Signa GUI allows the user to specify window types (e.g., Hamming, Hann, Rectangular, etc.), zero padding, aperture size, frequency ranges and other relevant parameters for generating range profiles and ISAR imagery. After the range profile or ISAR image is generated, the user can overlay the CAD model on the results to provide more context and insight to the simulation.

Realistic Target Models and MaterialsSigna operates on detailed 3D CAD models of candidate targets. The surfaces of the 3D CAD models can be defined as a combination of metal, absorbers and layered material coatings. Signa supports a variety of facetized CAD formats as well as IGES models. Through the GUI the user can build up complex scenes consisting of multiple CAD models and assign unique

Signa Features At A Glance:

• Far field radar signature prediction of electrically large targets and complex environ-ments.

• Signa predicts:◊ Complex monostatic radar

cross sections (RCS)◊ Range profiles◊ ISAR images for downrange

and cross-range scattering◊ Co-pol and cross-pol RCS

• Optimized for analysis of elec-trically large, high-fidelity CAD models.

• Harnesses parallel processing on multi-core CPUs to realize near linear speedup with each available core.

• Intuitive and powerful user interface with 3D visualization for problem setup and results display.

• General multi-layer materials for dielectric coatings.

• Import 3D CAD to define the platform/environment.

• Multi-CAD scene composition enables complex geometries with subassembly rotations and translations to quickly analyze changing target geom-etry features.

• Specialized ray visualization tools provide visualization of multi-bounce physics to gain a better understanding of the important target feature interactions.

• Ability to exploit computing clusters for ever greater com-puting throughput.

Visual Ray Tracing (VRT) provides insight into SBR ray bounces and scattering

articulation to individual parts.

Model Construction with Canonical ShapesCanonical CAD objects such as plates, spheres, cylinders, tophats, ellipsoids, parabolics and several additional geometry types can also be defined through the GUI.

This capability allows users to build up more complex geometries from simple structures. It also allows users to add simple geometry to an

existing CAD model for quick trade studies.

Visual Ray Tracing and Ray DiagnosticsSBR rays can be displayed before or after analysis as they would be computed in the Signa engine. The Visual Ray Trace (VRT) feature provides helpful information in understanding ray bounce mechanics, General Optics (GO) blockage, and ray densities for a given angle of target illumination.

Model Data Import for Comparisons Signa also supports loading external RCS data for plotting, visualization and comparison to simulated results. The external data can be measured or simulated data and common RCS data formats are supported. The ability to load external data is very useful for validation studies and general comparisons with other techniques or sources.

Efficient SimulationSigna’s solver is lightning fast. It is optimized for parallel processing on multi-core CPUs; providing a near linear speedup with each additional core.

Need even faster simulations? Signa also has an MPI computing option so you can leverage the power of multiple computing nodes to massively accelerate simulation time.

A Complete Monostatic RCS Analysis EnvironmentSigna is a powerful and modern radar signature simulation software tool based upon the proven SBR technique. With the advanced GUI, post-processing capabilities and built-in diagnostic features, you can characterize the radar signature of your most complex targets with confidence.

Delcross Technologies, LLCwww.delcross.com | contact@delcross.com

(217)363-3396

Signa Feature Detail

• Predict complex radar cross sections (RCS), target range profiles and ISAR images in complex environments.

• Optimized for analysis of electrically large, high-fidelity target CAD models.

• Harnesses parallel processing on multi-core CPUs to realize near linear speedup with each available core.

• Intuitive and powerful user interface with 3D visualization for problem setup and results display.

• 3D RCS visualization modes provided with target CAD model for clarity and insight.

• General multi-layer materials for dielectric coatings.

• Complimentary capability to full-wave EM solver.

• Import 3D target CAD models (IGES, OBJ, STL, ACAD Facet) to define the platform/environment for Signa target simulations.

• Multi-CAD scene composition enables complex geometries with subassembly rotations and translations to quickly analyze changing target geometry features.

• Single, list and swept frequency analysis modes.

• Single, swept, and sector aspect angle modes.

• Signa’s multi-core parallelized ray tracing engine accounts for important effects:• PO first bounce and GO blockage• Diffraction• Multi-bounce physics• Curved surface ray divergence correction• PTD wedge corrections

• Signa computes:• 3D RCS plots with target CAD model overlay• 2D RCS plots (Cartesian/polar)• Range profiles with target CAD model overlay• Range profile waterfall plots in rectangular

and donut (polar) formats• ISAR images for downrange and cross-range

scattering with target CAD model overlay• Co-pol and cross-pol RCS scattering

• Specialized ray visualization tools provide visualization of multi-bounce physics to gain a better understanding of the important target feature interactions.

• Ability to exploit computing clusters with MPI processing for ever greater computing throughput with Delcross Acceleration Tokens (DATs).

• OS: Windows and Linux

• Available as a single-user nodelocked license (portable USB dongle or MAC address lock) or as a floating LAN license for enterprise installations.