cst-geometry 0.1.3

Package for modeling in CST Microwave studio using python

CST geometry manager

It’s a package that allows you to model geometries contain wires and then export it into CST Microwave Studio project using python.

Features

• One file format for all wire geometries

• Сreating a CST project directly from a script or notebook.

• Convenient data structure for creating your own unique complex geometries from wires

Install

For simple installation use pip:

pip install cst-geometry

Usage

During using scripts or notebooks for creating projects all the CST Microwave studio windows must be closed

To create your own geometry use Wire and Geometry classes. Wire object initializing using start point r0, finish point r1 and its radius. Geometry object initializing using array of Wires objects. Geometry object has methods export_geometry for export .txt file and create_cst_project for creating project in CST Microwave Studio.

import numpy as np
from cst_geometry import Wire, Geometry


  def get_circular_geometry(radius, lengths_of_wires, wire_radius=1e-3, delta_angle=0):
      number_of_wires = len(lengths_of_wires)
      angles = np.linspace(0, 2 * np.pi, number_of_wires, endpoint=False) + delta_angle

      wires = []
      for i, length in enumerate(lengths_of_wires):
          phi = angles[i]
          wire = Wire(
              r0=(radius * np.cos(phi), radius * np.sin(phi), -length / 2),
              r=(radius * np.cos(phi), radius * np.sin(phi), length / 2),
              radius=wire_radius
          )
          wires.append(wire)

      return Geometry(wires)

Examples

# Path to CST DESIGN ENVIRONMENT.exe
path_to_CST_DE = "Absolute\Path\To\CST DESIGN ENVIRONMENT.exe"

# Route to folder with .txt geometries and CST projects
route_to_folder = "Absolute\Path\To\FOLDER"


def circular_geometry_equal_wires(length, number_of_wires, radius):
    lengths = [length for i in range(number_of_wires)]

    circular_geometry = simple_geometries.get_circular_geometry(
                    radius=radius, lengths_of_wires=lengths, wire_radius=1e-3, delta_angle=0
    )
    return circular_geometry


# Creating an array of 18 vertical aligned wires with length 2
# on of imaginary cylinder with radius 4
circular_geometry = circular_geometry_equal_wires(2, 18, 4)
output = circular_geometry.create_cst_project(
    name="circular_geometry",
    path_to_CST_DE=path_to_CST_DE,
    path_to_geometry_folder=route_to_folder,
    path_to_CST_project=route_to_folder
)

This code creates simple geometry contain 18 wires equally distributed on imaginary cylinder. Then create_cst_project method creates project. To start using scripts firstly need to change path_to_CST_DE variable. CST project create in cst_project folder.

Several examples with CST projects are located in examples/ folder.