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Hi Volker,
Yes, from HFSS simulation it shows an increase in inductance when Coil L2 is shorted. While in physical measurement as I previously stated, the L1 seems to decrease (might be due to coupling) which results in increased resonant frequency. I assume that this is due to the simplified...
Hi Volker,
Thanks for sharing your article, it helped me to better understand port configuration. Now, I have re-run the simulation by simplifying to 1 differential port per inductor. The k factor is calculated by using formula mag(sqrt(1-1/(Z11*Y11))) and is found to be 0.0311 (at 2.5 GHz)...
No problem my friend, thanks for your help. Well HFSS does support Y and Z parameter and the reason I was asking about the formula is that Z11 and Y11 are vector quantities while k factor is scalar. There should be something like Mag, Re or Im etc in that formula right?
I will try simulating...
Sorry for the late reply man. Ok let me explain what I have actually simulated. I have excited all terminals with 50 ohm lumped ports. The reference conductor is same metal for all ports. I have pointed the location of four ports in the attached picture. Also I want to mention that I haven't...
Hi volker,
I haven't calculated coupling coefficient or k factor for that inductor pair. What I am experiencing during physical measurement is a slight shift in frequency (around 70 MHz) across L1 when I turn-on the coil L2. May be something else is causing the drift but I need to know if...
Thanks for your elaboration, that explains a lot. I have defined sufficient model resolution under Mesh Operations and have inspected elements by plotting Mesh. The Tetrahedral geometry in between trace gaps appears to be one box or cell as shown in attached figure. Is it an acceptable number...
Hi PlanarMetamaterials,
The meshing is effectively done by running multiple passes and I can see the convergence. Can you please elaborate more like what exactly do you mean by saying the need for 2 cells? Do I have to put some extra planes etc or something in between both structures in order...
I appreciate your prompt response. Well sorry for the confusion. Yes, the air box is extended along each axis which is not shown in the image. The negative z box represents substrate material.
I am expecting a slight shift in frequency due to coupling effect when simulating S-parameter in LC...
Hello guys,
I have a model in HFSS that contains two coils (L1 and L2) separated by a distance as shown in attached picture. The solution type used is Driven Terminal and I have excited all the terminals with 50 ohm Lumped ports. The whole structure is enclosed inside a radiation boundary...
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