Using Altair HyperWorks to Generate Electrically Large Surface Meshes with Dielectric Regions for Radar Cross Section or Antenna Placement Simulation

Robert Cook, SELEX GALILEO

Radar Cross Section (RCS) and installed antenna placement are important parameters for aerospace designs. As products become more integrated with wireless technology, antenna placement for robust performance has in particular become an important design consideration. Electromagnetic (EM) solvers based on the Method of Moments (MoM) and the Multi-Level Fast Multiple Method (MLFMM) require high quality surface meshes of electrically small elements. In order to provide a robust mesh for the analysis of even a small jet aircraft, the number of regular sized mesh elements can grow beyond several million at just a few GHz. This paper presents a process automation toolset developed within HyperWorks that allows the generation of arbitrarily large surface meshes, with defined electrical properties at the element level, for use with EM solvers to calculate RCS or installed antenna performance. A case study for a fast-jet aircraft, assessed for radar tracking and avoidance capabilities with approximately 100 million mesh elements is presented.

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