Antenna Array Design

The current state of the art workflow for antenna array design software involves the following steps:

Pattern requirement->Apature synthesis->first array synthesis->final array synthesis->sensitivity analysis->antenna siting

 

There are existing commercial software tools that work well for the optimization and design of arrays. However, for the initial layout of the first array most engineers rely on expertise, textbooks and spreadsheet analyses. Also, the full-wave simulation of the entire array is challenging with the leading commercial antenna array design tools. Antenna siting is a final activity that is not part of these popular packages.

Galileo-EMT is a new package of antenna array design software that complements existing commercial packages by providing a useful suite of tools for large-array design engineers. The suite is composed of four main components that are helpful for array designers:

  1. Large-array design tools – These practical tools guide and speed the effort in the initial phases of array layout to meet design requirements. Galileo-EMT includes a collection of useful tools that can greatly speed the initial layout. Antenna designers find themselves turning to these practical tools frequently.
  2. Large array simulation solver acceleration techniques – Galileo-EMT has unmatched algorithms that enable final validation on entire arrays. In some cases, simulations on very large arrays are impossible or impractical to perform with standard commercial solvers. These acceleration techniques are unique to Galileo-EMT.
  3. Integrated antenna siting module – Galileo-EMT enables effective antenna siting on large and complex platforms to verify the performance and interoperability. The siting tool can synthesize antenna equivalent sources that enable simulation during early design phases when information about the antennas and platform are limited. Such synthetic methods are not included in the leading commercial tools. Galileo-EMT integrates best-in-class acceleration methods necessary for antenna siting (MoM and IPO).Read more about Galileo-EMT for Antenna siting here
  4. Galileo-EMT framework and user interface – The framework organizes the geometry, meshes, simulations and analyses in a clear and user-friendly manner. Galileo-EMT is helpful for initial design of arrays all the way through siting on platforms. Read more about Galileo-EMT here

 

Large-array design workflow with Galileo-EMT

Galileo-EMT tools speed the effort to layout an array for the synthesis symmetric of aperture fields fulfilling the requirements on the corresponding far-field.

The typical work flow for the initial array layout:

requirements-> equivalent aperture-> first array layout-> Coarse and fine model generation-> space mapping and optimization-> verify final antenna array design model

1. Requirements

Galileo-EMT has easy to use tools for capturing the design requirements. The tools can import from many sources and visualize what has been specified.

tools for capturing antenna array design requirements

2. Equivalent aperture

Galileo-EMT can quickly synthesize the equivalent aperture that will meet the far-field  specifications. Starting from the same requirements the tool can produce multiple equivalent apertures , so an analyst can pick the one that is most practical to implement. The equivalent aperture is a powerful first step that empowers design engineers to quickly determine the initial array layout.

early stage antenna design solutions, modeling synthetic apertures based on antenna design requirements

early stage antenna design solutions, modeling synthetic apertures based on antenna design requirements far field

3. First Array Layout

The aperture E-field distribution indicates where it would be advantageous to place radiating elements to create an array that can satisfy the design specifications.

aperture E-field distribution. antenna array modeling software

The array excitation is obtained automatically by sampling the aperture field distribution (module and phase) at the center of each array element.

Next, the far field is simulated using one of five acceleration techniques.

antenna-model design far field simulation

4. Coarse and fine model generation

Next, we need to use optimization algorithms to improve the array performance. Galileo-EMT allows for both coarse and fine model generation to allow for a faster and less computationally expensive process.

optimization algorithms improving array performance.

Large array simulation solver acceleration techniques

The acceleration techniques in Galileo-EMT applicable for large arrays are unique and not available in other commercial tools. They allow for verification of the antenna performance on large arrays that may not be possible otherwise.

If you have interest in Galileo-EMT antenna array design software, please contact us for a free demo.