How to set a port voltage

Hi David,

For time-varying signals you should use the Time Analysis in POSTFEKO. There is a simple example in the ExampleGuide, section G.

Make sure to simulate a fitting frequency range for your time signal. Good videos can be found on YouTube:

https://www.youtube.com/watch?v=ahb6SCsYhzY
https://www.youtube.com/watch?v=GSUdAjzwH-o

Best regards,
Torben

Hi David,

For time-varying signals you should use the Time Analysis in POSTFEKO. There is a simple example in the ExampleGuide, section G.

Make sure to simulate a fitting frequency range for your time signal. Good videos can be found on YouTube:

https://www.youtube.com/watch?v=ahb6SCsYhzY
https://www.youtube.com/watch?v=GSUdAjzwH-o

Best regards,
Torben

Hi Torben,

thanks for your reply.

I have two questions after watching the video.
1. I have data on the voltage as a function of time for three ports. How do I input the data to a specific port?
2. I want to achieve the above, should I focus on Time Analysis or schematic?

Hi Torben,

thanks for your reply.

I have two questions after watching the video.
1. I have data on the voltage as a function of time for three ports. How do I input the data to a specific port?
2. I want to achieve the above, should I focus on Time Analysis or schematic?

Hi David,

The time signal will be applied to the excited ports. So I would suggest to excite Port 1 only.

Hi David,

The time signal will be applied to the excited ports. So I would suggest to excite Port 1 only.

Hi Torben,

good idea! I will try it. When I do the Time Analysis, btw, will what I set the port value in schematic affect the final result? 

Hi Torben,

good idea! I will try it. When I do the Time Analysis, btw, will what I set the port value in schematic affect the final result? 

No, a simple 1V voltage source should do.

No, a simple 1V voltage source should do.

It is very helpful for me and I have one more question.

How can I get result like this? 

I think this should be solved by relying on Time Analysis. 

No, a simple 1V voltage source should do.

Sorry, I didn't make it clear.

What I mean is that I want to get the output data under a set of signals. The signal is the port voltage based on the time.

Sorry, I didn't make it clear.

What I mean is that I want to get the output data under a set of signals. The signal is the port voltage based on the time.

Hi @Liu Xiao ,

Unfortunately, I don't quite understand your question. The image seems to show the E-field over frequency. In POSTFEKO, you can view results over both time and frequency in Time Analysis.

Best regards,
Torben

Hi @Liu Xiao ,

Unfortunately, I don't quite understand your question. The image seems to show the E-field over frequency. In POSTFEKO, you can view results over both time and frequency in Time Analysis.

Best regards,
Torben

Hi Torben,

how can I view the frequency domain result in Time Analysis? 

Best regards,

Xiao

Hi Torben,

how can I view the frequency domain result in Time Analysis? 

Best regards,

Xiao

Hi @Liu Xiao,

This picture shows it:

Hi @Liu Xiao,

This picture shows it:

Hi,

one more question, if I view the result in "trace - near field", will the result be based on Time Analysis?

There is no difference in my model if I add the time signal or not.

Hi,

one more question, if I view the result in "trace - near field", will the result be based on Time Analysis?

There is no difference in my model if I add the time signal or not.

Hi @Liu Xiao,

Now I know what you're looking for. You can do this with a little workaround:

• Add your frequency near field result to a Cartesian graph
• Add you time signal to the same graph and switch the independant axis to "Frequency":
  
• Add a new Trace to the graph and multiply the near field and the time signal:
  

Hope this helps!

Best regards,
Torben

Hi @Liu Xiao,

Now I know what you're looking for. You can do this with a little workaround:

• Add your frequency near field result to a Cartesian graph
• Add you time signal to the same graph and switch the independant axis to "Frequency":
  
• Add a new Trace to the graph and multiply the near field and the time signal:
  

Hope this helps!

Best regards,
Torben

Thank you so much and have a nice weekend!