Galileo-EMT – Antenna Modeling for Complex Platforms

Galileo-EMT Software picture

Galileo-EMT

Galileo-EMT is a practical tool for the entire workflow of an electromagnetic engineer working on large and complex platforms. Galileo-EMT has the ability to synthesize sources with a minimal amount of information in order to begin a platform design early in a program. The software platform has data structures to organize an engineer’s workflow. Galileo-EMT allows for statistical or synthetic calculations early in a program. Users can add details of the antennas and the platform as a project matures and use the solvers for final verification. It is designed to be a daily working tool for professional electromagnetic engineering teams.

Galileo-EMT features:

  • A wide palette of validated electromagnetic solvers
  • A large number of fast tools and functions dedicated to antenna engineers
  • A rich set of user-friendly modeling procedures

As with most general solvers, Galileo-EMT can simulate antennas directly meshed into the model. However, this information is often not available early in a program because the design is not complete or the supplier considers the antenna CAD to be proprietary. For these situations, Galileo-EMT features synthetic methods that allow for an accurate equivalent model of the antenna using available information.

Galileo-EMT synthetic methods listed

Galileo-EMT can synthesize an equivalent antenna

Galileo-EMT allows for a  highly accurate prediction of the EM performance of single antennas and arrays integrated on complex platforms. The platform includes specialized computational methods and functions required by integrators that are not present in general purpose tools.

Galileo-EMT facilitates an organized workflow and model re-use. The platform is optimized to manage the complexity of the design of real antenna systems and the modeling of realistic platforms, such as aircraft, spacecraft and automobiles.

A picture of the user interface of the software

The User Interface for Galileo-EMT is updated and ready for new and experienced teams

Array modeling and design

Picture of near fields from an antenna array

Galileo-EMT has professional antenna array design features

  • A dedicated array CAD tool to create complex layouts and to manage excitation laws, sequential rotation
  • Tools to define the initial array layout and excitation based on unconstrained and constrained synthesis of equivalent apertures from pattern requirements
  • Modeling procedures at different complexity and accuracy levels: isotropic elements, element pattern from measurement or simulation, full-wave modeling of the whole array (including inter-element coupling) and more
  • A versatile optimizer with both global and local optimization algorithms
  • Companion tools for sensitivity, failures and scan blindness analyses
  • The capability to “reduce” array models to allow the efficient analysis of their performance when installed on a platform
  • Innovative methods for fast and accurate full-wave analyses (MoM/SIM, SFX, SM-AIM, multilayer Green Functions)

Antenna siting, RFC Analysis

Currents on a car surface visualized by color

Galileo-EMT is optimized for large and complex platforms

From IDS’s experience in “platform system integration” we know that a good full-wave modeler doesn’t entirely solve the problem. Rather, different capabilities are needed: more than one solver to accurately cover wide frequency ranges and allow cross-checking of predictions, CAD and meshing tools, smart functions to import and to elaborate manufacturers’ antenna data (often incomplete) and tools for data processing. Galileo-EMT puts all of that at one’s disposal:

  • Sophisticated CAD, cleaning and meshing tools
  • A palette of 3D simulation methods, parallelized on shared and distributed memory platforms (OpenMP, MPI):
    • Method of Moments (MoM, MoM/SFX, MoM/MR, MLFMA)
    • Physical Optics (PO/PTD/ITD),
    • Uniform Theory of Diffraction (UTD)
    • Mixed methods
    • A library for material characterization
  • A scalable antenna modeling strategy that allows using: patterns, Spherical Wave Expansion, Huygens (equivalent) currents, meshes…
  • Capability to import external antenna models
  • A palette of methods for antenna coupling calculation: S-parameters, Reaction integrals, Generalized Frijs formula…
  • On-mesh visualizations and diagnostic ray tracing

Special modeling for spacecraft, aircraft and automotive platforms

plume

Galileo-EMT contains specific computational modules and procedures to efficiently solve complex problems typical of aerospace and automotive applications:

  • Procedures to enable the analysis of complex antennas (e.g. arrays) by means of “reduced” models based on the equivalence principle
  • Analysis of the effect of plasma plumes, emitted by ion thrusters mounted on spacecraft, on radiation performance of antennas (blocking effects, pattern distortion, spurious modulation of RF signal)
  • Analysis of antennas installed aboard re-entry vehicles; blocking and distortion effects of the high temperature plasma cloud; computation of the channel transfer function between vehicle and ground stations during their whole trajectory
  • RE-RS analyses inside a aircraft, spacecraft or vehicle based on the Oversized Cavity Theory (Power Balance Method)
  • Full-wave optimization of performance of multi-functional and structural antenna systems
  • Multi-method analysis of the interactions among feeders and reflectors
  • Risk analysis and control for Passive Intermodulation Products (PIM)
  • Aircraft radome analysis tool

To learn more about the capabilities of Galileo-EMT, please contact EMA