flex-rf 0.1.0

Extremely large radio-frequency and microwave electrodynamics simulations.

flex-rf

flex-rf is a software package for extremely large radio-frequency and microwave electrodynamics simulations using the finite-difference time-domain (FDTD) method. You can work with flex-rf through the Python package or through a web-based graphical user interface.

Read the RF documentation for guides, examples, and API reference material.

Quickstart

Install the latest stable flex-rf package:

pip install --user flex-rf

Configure flex-rf with the API key from your account:

1. Get your API key from the RF GUI.
2. Run:

flex-rf configure --apikey=XXX

flex-rf stores credentials in its own configuration, separate from Tidy3D. By default this is ~/.config/flex-rf/config.toml; if FLEX_RF_BASE_DIR is set, the file is written under $FLEX_RF_BASE_DIR/config/config.toml.

Environment precedence for API keys is:

1. FLEX_RF_APIKEY
2. the flex-rf config.toml

Runtime-only logging and local cache settings can be configured with flex_rf.config and are applied only around flex_rf.web calls:

import flex_rf

flex_rf.config.logging.level = "ERROR"
flex_rf.config.local_cache.enabled = False

These runtime settings are process-local and are not written to flex-rf or Tidy3D config files. Persistent cache enablement, directory, and size limits are configured through the CLI:

flex-rf cache configure --enabled --directory ~/.cache/flex-rf/simulations --max-size-gb 20 --max-entries 1000
flex-rf cache info
flex-rf cache clear

For wrapper-phase notebooks that need to silence Tidy3D warnings before a flex_rf.web call, use the Tidy3D compatibility namespace directly:

import flex_rf.tidy3d as rf

rf.config.logging.level = "ERROR"

Start Here

After installation, choose the workflow that fits how you want to work with flex-rf.

Choose Your Workflow

• Use the Python package when you want scriptable simulation setup, automation, and postprocessing.
• Use the RF GUI when you want a browser-based workflow for simulation setup and job management: RF GUI
• Open the RF API reference for the main flex-rf and Tidy3D microwave entry points: Tidy3D microwave API reference

Related Products

flex-rf is part of a broader product ecosystem:

• PhotonForge for photonics design and simulation workflows.
• RF GUI for browser-based simulation setup and job management.
• Tidy3D microwave docs for deeper RF reference material.

Learn More

• About our solver