User-Friendly Waveguide Mode Visualizer [Educator’s Corner]

Waveguides have been an amusing yet daunting subject for any student studying microwave theory. The “structure that guides waves” comes in both rectangular and cylindrical shapes. Finding out the equation of electric and magnetic fields inside a waveguide is a well-studied one, often requiring expertise in electromagnetic (EM) theory (see “Field Equations (for Plot Generation)”]. These studies result in many valid solutions, each of which is called a mode. Visualizing different modes requires commercial software and is often limited by order and associated with high time complexity—until now!