Does this work for PCB coils ? I tried it on some rectangular FR-4 PCB coils with differens sizes. I did measure every PCB coil and find their self resonance frquencies. I also tried to find self resonance frequency of my PCB coils with the help of Electromagnetic Design and simulator program Ansys HFSS. There are huge differences between the results that I measured and simulated. Do you have any idea why would that be ? I need help, thanks in advance
Good! now you have the transverse electro magnetic (TEM) resonant frequency. but what about the second resonamt frequency? The Longitudinal Magneto Dielectric (LMD) is around Phi times higher in frequency and out of phase with the primary coil, while the TEM resonance is in phase.
Sorry you lost and confused me! Need clearer explanation and less fiddling with the kit, which should have been set up properly before the tutorial. This nearly works but not quite. Try a V2 maybe?
You are right, I should make a clearer v2. The basic idea is to measure the step responce of the coil and from that measure the resonance frequency via the oscilloscope probe. Now that I think about it, I should have probably done the setup a bit differently, and subtracted the effects of the probe capacitance(which caused a slight under estimation of the resonance frequency).
@@ivanrodionov9724 Thanks for your reply and for taking my comments as the constructive criticism I intended them to be. Your other videos are really good. Thank you.
Does this work for PCB coils ? I tried it on some rectangular FR-4 PCB coils with differens sizes. I did measure every PCB coil and find their self resonance frquencies. I also tried to find self resonance frequency of my PCB coils with the help of Electromagnetic Design and simulator program Ansys HFSS. There are huge differences between the results that I measured and simulated. Do you have any idea why would that be ? I need help, thanks in advance
Good! now you have the transverse electro magnetic (TEM) resonant frequency.
but what about the second resonamt frequency?
The Longitudinal Magneto Dielectric (LMD) is around Phi times higher in frequency and out of phase with the primary coil, while the TEM resonance is in phase.
very informative.
Was that an AC or DC square wave?
It should not matter
Sorry you lost and confused me! Need clearer explanation and less fiddling with the kit, which should have been set up properly before the tutorial. This nearly works but not quite. Try a V2 maybe?
You are right, I should make a clearer v2.
The basic idea is to measure the step responce of the coil and from that measure the resonance frequency via the oscilloscope probe. Now that I think about it, I should have probably done the setup a bit differently, and subtracted the effects of the probe capacitance(which caused a slight under estimation of the resonance frequency).
@@ivanrodionov9724 Thanks for your reply and for taking my comments as the constructive criticism I intended them to be.
Your other videos are really good. Thank you.