Hello,

Take the help from the CST file.

Thanks,

Step 1: Create a New Project

Open CST Studio Suite and create a new project. Select "Waveguide" as the project type.

Step 2: Design the Waveguide

Design the waveguide by specifying its dimensions, material, and frequency range.

Step 3: Create the FSS Unit Cell

Create a new component and design the FSS unit cell. This typically consists of a metallic patch or slot on a dielectric substrate.

Step 4: Define the FSS Parameters

Define the FSS parameters, such as the patch size, slot size, substrate thickness, and material properties.

Step 5: Create a Periodic Structure

Create a periodic structure by replicating the FSS unit cell in the x- and y-directions.

Step 6: Place the FSS on the Waveguide

Place the FSS on top of the waveguide, ensuring proper alignment and orientation.

Step 7: Set Up the Simulation

Set up the simulation by specifying the frequency range, mesh settings, and boundary conditions.

Step 8: Run the Simulation

Run the simulation and analyze the results, including the transmission and reflection coefficients.

Step 9: Optimize the FSS Design

Optimize the FSS design by adjusting the unit cell parameters and re-running the simulation until the desired performance is achieved.

Some key settings to consider:

- Use the "Unit Cell" boundary condition to simulate an infinite periodic structure.

- Set the "Waveguide Ports" to simulate the waveguide modes.

- Use the "Frequency Domain" solver to simulate the frequency response of the FSS.

- Set the "Mesh" settings to ensure accurate simulation results.

Zakir Ali Smrity Dwivedi Thank you for your answers, even though they are not useful at all and out of track. Please don't give answers just to earn credits.