Rotman Lens openEMS and Blender Simulation Guide
This video will walk you through how to simulate a Rotman Lens with openEMS and Blender. You will learn how to take advantage of Blender's powerful capabilities for 3D modelling and mesh generation for creating openEMS RF simulations and visualizing results.
I will first cover how to use Blender to generate an antenna model from a basic image, setting-up ports and field dumps and other tips and tricks to ensure a successful simulation run. Then exporting meshes to openEMS and using Blender's python editor to write scripts to handle exporting ports and field dumps setup more efficiently.
Then I will touch on setting up the actual openEMS simulation in Octave, and then visualizing and analyzing the results in Paraview. Then using Python scripts to import the simulation results back into Blender and then creating a "geometry node" setup to create impressing visualizations and animations of the result.
00:00 Introduction
01:02 What is a Rotman Lens?
02:01 Capturing the lens model with Inkscape
03:11 Importing lens model into Blender
05:36 Setting-up the model - substrate & GND plane
10:38 Setting-up the model - ports & field dumps
14:00 Exporting to openEMS from Blender
18:34 Python script to export ports & field boxes
22:07 openEMS simulation setup in Octave
25:33 Viewing simulation results in Paraview
29:47 Exporing simulation results to Blender
31:31 Geometry Nodes for data processing & visuals
39:41 Python scripts for exporting & importing all frames
42:45 Animating data with Geometry Nodes
The design of the Rotman Lens itself is from "Attaran, Ali, Chowdhury, Sazzadur, Fabrication of a 77 GHz Rotman Lens on a High Resistivity Silicon Wafer Using Lift-Off Process, International Journal of Antennas and Propagation, 2014, 471935, 9 pages, 2014.
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