TAGGED: 2d-modelling, mode-varfdtd
March 21, 2023 at 4:00 pmminusunnySubscriber
Hi, I am trying to simulate a phase shifter in varFDTD. The injection axis is 'X' and in the result, more power is in Ey than Ex. if I am trying to extract the phase, should I look into the phase of Ex or Ey?
March 21, 2023 at 6:31 pmGuilin SunAnsys Employee
As you know, the phase is associated with a field component. So you can use the domiant field component. However, a better way might be to use S parameters. Eg in your case, you can use S21 to evaluate the phase. Onething you may need to consider is: where exactly do you want to quantify the phase? relative to source or any special location? the monitor gives the phase at the monitor plane, whether it is for field components or S parameters. You may need to remove the propagation phase from source to device front surface and the device back surface to the monitor, which has analytical solutions.
March 21, 2023 at 9:22 pmminusunnySubscriber
I am doing a phase shifter based on the grating. I should get phase shift at the output. It is a passive component.I used frequency and power monitor , linear Y for the data extraction. The screenshot of my simulation arrangement and the code i used to extract data is given below. I am getting 90 degree phase shift on Ex, but the phase of Ey is varying verymuch with respect to simulation window and the phase is way off. Ey phase is very sensitive to simulation window, i tried a sweep and was not able to figure out a stable value for simulation window as it is varying so much.
March 21, 2023 at 10:03 pmGuilin SunAnsys Employee
Are you doing 2D simulation? otherwisde you should use a 2D monitor not a 1D line monitor.
Which field component, Ex or Ey (transversal component) is the dominant?
Have you considered my suggestion to use S parameter? Since this is waveguide and the mode does not have a flat wavefront, you cannot use the phase at one point or a line or a plane to quantify the phase.
Only S parameter can have one unique value of phase, after propagation phase compensation.
I hope this helps.
March 21, 2023 at 10:06 pmminusunnySubscriber
Ey component is dominant. So i have to use EME to extract s-parameters? Also, can i use frequency and power monitor to extract phase?
March 22, 2023 at 9:58 pmGuilin SunAnsys Employee
Port in FDTD can give you S parameters.
- You must be logged in to reply to this topic.
Boost Ansys Fluent Simulations with AWS
Computational Fluid Dynamics (CFD) helps engineers design products in which the flow of fluid components is a significant challenge. These different use cases often require large complex models to solve on a traditional workstation. Click here to join this event to learn how to leverage Ansys Fluids on the cloud, thanks to Ansys Gateway powered by AWS.
Earth Rescue – An Ansys Online Series
The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.
Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.
- Why am I getting “process exited without calling finalize”, and how do I fix it?
- “Import optical generation” or “delta generation rate”?
- Error: addfdtd is not a valid function or a variable name
- Error on Lumerical device
- Using a license file on a new license server
- Ansys Insight: Transmission results greater than one
- Ansys Insight: Diverging Simulations
- Finding your Ansys (or Lumerical) account number
- Ansys Insight: Why my simulation result is different from published paper or experiment?
- Is there a Lumerical script command to output the Simulation and Memory requirements?
© 2023 Copyright ANSYS, Inc. All rights reserved.