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[ha_nguyen3]

I want to study E-fields across the model when applying 42V at 200kHz to copper plates that are coated with insulator (e of 5,000). I'm using Ansys HFSS and have the following questions:

1. To use "voltage" function as an excitation, I have to create a sheet. When the sheet is placed across the model to connect 2 conductors, it s the E-fields inside the model. I have to create "copper wires" that are extended from the copper plates and away from the model. The insulator also covers the extended portion. I create a sheet at the end of two "copper wires" to induce the voltage. Is it a correct way to use this "Voltage" function?
2. The E-field in conductors should be 0. Instead of having "blue" color (0V/cm) on the bar scale, the conductors (yellow and purple) appear to be white. Does HFSS automatically exclude conductors from E-field display?
3. The E-field in the air (e of 1) is 220V/cm while the E-field in the insulator (e of 5,000) is 0.2V/cm. I understand that due to higher dielectric constant, the E-field in insulators should be significantly lower than that in air. However, if the insulators completely cover the conductors, the E-fields are forced to travel across the insulators. Wouldn't the E-field in the insulators be higher than that in the air?

[ha_nguyen3]

Please ignore the last question. I think what I meant here was E_polarization of the dielectric whereas Ansys displayed the net electric field. And it totally makes sense that E_net is lower for the dielectric compared to that for air.

[ha_nguyen3]

Would you please take a look at my questions? Please discard the last question.
"When the sheet is placed across the model to connect 2 conductors, it messes up the E-fields inside the model."
If you have any tutorials on how to use "voltage" as an excitation, I would really appreciate. I could only find videos for wave ports and lumped ports.

[CB]

have you tried using a circuit port? If I read into your question you just want to excite this device with some 50 ohm source impedance.

[ha_nguyen3]

In brief, my model consists of a rat head (red box) that are placed between 2 copper plates (blue arrows). I want to study the E-fields in the rat head when applying 42V at 200kHz.
Initially, I tried to use lumped port as an excitation in my control model, but the results showed that the locations of the port affected the E-fields You can find the results in this post - /forum/discussion/31898/e-field-in-insulator#latest.
This problem occurred when using voltage source as well. To prevent the port or sheet cutting through or even touch the rat head, I created ÔÇ£extended wires" and connected them at the end (as shown below). This seems to give reasonable results for my study.
Regardless of using lumped port or voltage, what I try to do is to maintain the voltage difference between 2 copper plates at 42V and prevent unwanted effects of the port's placement on E-fields.
My questions are:
If this is an incorrect way to use voltage source, can you please let me know how this excitation should be done?
Would you kindly explain why you recommend a circuit port, instead of voltage source? And what is a circuit port that you prefer to? Do you mean wave port or lumped port?
I only know the applied voltage (42V) for my study. I don't know how much power or current it requires. If possible, I'm interested to learn how much power or current the copper plates consume.

[ha_nguyen3]

[ha_nguyen3]

This question is closed on the Forum as models are being shared through Ansys Commercial Support Channel.