afterglow18x
Newbie level 4
![Newbie level 4](/styles/images/ranks/blevel1.gif)
Hi all to the experts out there:grin:
I have simulated a half wavelength dipole using HFSS and have plotted the s11 and the impedance plots. However, I do not understand why the resonant frequency that I have measured from the two plots differ in value. My solution frequency is set to 30MHz. The resonant frequency from the s11 plot is around 28.1 MHz (point of minima) whereas the resonant frequency from the impedance plot is around 30.1 MHz (measured at point where Im impedance is zero). Please kindly enlighten a newbie like me.
Thank you very much for your time.![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I have simulated a half wavelength dipole using HFSS and have plotted the s11 and the impedance plots. However, I do not understand why the resonant frequency that I have measured from the two plots differ in value. My solution frequency is set to 30MHz. The resonant frequency from the s11 plot is around 28.1 MHz (point of minima) whereas the resonant frequency from the impedance plot is around 30.1 MHz (measured at point where Im impedance is zero). Please kindly enlighten a newbie like me.
Thank you very much for your time.
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