Impedance as function of frequency

Hello @RG888,

I would suggest that you look at the Getting Started Guide and the Examples Guide for some help on learning about the basic mechanics of how to use FEKO.  Specifically,

• 'Examples Guide A-1: Dipole example' will give you an example of a dipole
• 'Examples Guide A-7: Log Periodic antenna' will give you an example of how to plot impedance over frequency

I hope that helps! /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20' />

Andries

Hello andries, 

Thank you for your suggestions. Yes example guide is good way .

Finally, I got the plot .

 Thanks

Hello @RG888,

 

I would suggest that you look at the Getting Started Guide and the Examples Guide for some help on learning about the basic mechanics of how to use FEKO.  Specifically,

• 'Examples Guide A-1: Dipole example' will give you an example of a dipole
• 'Examples Guide A-7: Log Periodic antenna' will give you an example of how to plot impedance over frequency

I hope that helps! /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20' />

Andries

__Hello dear Altair Feko staff. In FEKO exhamples guide, you consider thin dipole (radius/length=1/1000), working at roughly 75 MHz frequency. It is well known, that 'such a dipole has a feedpoint impedance consisting of 73 Ω resistance and +43 Ω reactance' (from wiki). But in your exhamples guide i see 

                                              real part          imag. part            magnitude        phase
Impedance in Ohm        7.8729E+01       3.6658E+01          8.6845E+01      24.97

__So in manual Re(Z)=78.7 Ohm and this number differ's from theory. I improved mesh (from 'standard' to 'fine') and performed simulation. I expected Re(Z) to be closer to 73 Ohm. But i've got 81.9 Ohm (see picture below). Can you explain me why can't i approach 73 Ohm value.  

__PS: I am still using old version of FEKO 7.0. May be this is the problem....

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