[TowerTalk] Understanding Antenna Impedance Measurements

[Tod]

Jim (and Jim)

Those values look like they are within about 2% of expected values for the R
and within 20% or so on the X. Is the analyzer accuracy any better than that
if there is NO coax between the load and the analyzer?

Tod

> 
> I simulated the effect of about 218 ft of RG-8X (180 deg at 
> 1.85 MHz) with a load of 50+j20 ohms, at frequencies from 1.8 
> to 1.9 MHz.
> Frequency, MHz 1.8 1.82 1.84 1.85 1.86 1.88 1.9 R at load 50 
> 50 50 50 50 50 50 X at load 20 20 20 20 20 20 20
> 
> At the "antenna analyzer end" you get the following data:
> R at input 47.74 48.87 50.05 50.66 51.27 52.53 53.82 X at 
> input 15.68 15.98 16.21 16.29 16.36 16.43 16.41
>