Setting Sheet Size of Lumped RLC in HFSS

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Discussion Overview

The discussion revolves around the influence of sheet size on the simulation results when using lumped RLC components in HFSS. Participants explore how to appropriately set the sheet size and its implications for resistance, impedance matching, and overall simulation accuracy.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant notes that the size of the lumped RLC can influence simulation results and inquires about the optimal sheet size, questioning whether a square shape is preferable.
  • Another participant, who does not use HFSS, raises concerns about the 2D size of the lumped RLC in relation to wavelengths, suggesting that the size could affect resistance and impedance matching.
  • A different participant reiterates the concern about size affecting results and seeks guidance on how to set components in HFSS without the influence of sheet size.
  • One participant argues that it is not possible to eliminate the influence of sheet size, stating that the component value will depend on the area specified, and emphasizes the need to define the component shape and size according to physical manufacturing requirements.

Areas of Agreement / Disagreement

Participants express differing views on the impact of sheet size on simulation results, with some questioning its significance while others assert that it is crucial. The discussion remains unresolved regarding the best approach to setting the sheet size for lumped RLC components.

Contextual Notes

There are limitations regarding assumptions about the relationship between component size and simulation accuracy, as well as the dependence on specific definitions of resistance and impedance matching in the context of HFSS.

Melon
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Hi Guys
When I use lumped RLC in HFSS, I find that its size can influence the simulation result. How do I set the sheet size of lumped RLC? Make it square is better? Thanks.
 
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I do not use Ansys HFSS, but I would question the 2D? size of the Lumped RLC in wavelengths.

If you were using Lumped RLC to define a resistance, then size and the resultant resistance would change the termination and impedance matching.
 
Baluncore said:
I do not use Ansys HFSS, but I would question the 2D? size of the Lumped RLC in wavelengths.

If you were using Lumped RLC to define a resistance, then size and the resultant resistance would change the termination and impedance matching.
Yes, I set lumped RLC on 2D sheet in HFSS. And when its size changes, the result changes too. So I want to know how can I set a resistor/inductor/capacitor in HFSS without the influence of sheet size.
 
Melon said:
So I want to know how can I set a resistor/inductor/capacitor in HFSS without the influence of sheet size.
I do not believe you can. Where the lump has properties specified per unit area, the component value will be dependent on the area. You will need to define the component shape and size as the area of the physical component to be used later in manufacture, and then give it the appropriate properties to get the value required.
 

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