Help, Explaining of wheeler and medhurst formula #Designing of coil antenna
when
** L is calculated with unit inches
** C is calculated with unit centimeter
and i tried to calculate in the same unit but the result is many difference from LC which calculated from formula Resonant frequency.
http://www.icorp.net/users/kev/tesla/form.txt
Thank you
Actually, the result of Wheeler's formula is in μH and Medhurst in pF. Neither inches nor centimeters.
Question: What's the resulting frequency unit when you put μH and pF into the resonace formula?
Right, GHz
yes GHz , i got it. It was my misunderstanding.
By the way,For Wheeler's formula if i use in inches.so the unit of result is microhenrys not inches, right?
***If i think in only unit : The inductance for Single Layer : L(uH)= ((round^2)*(inches^2))/((9*inches)*(10*inches))
Finally,i got (round^2)*(inches). ***
Ps. I have know what is unit of inductance and Capacitance. but i am confused with the formula.
Or The unit of Wheeler's formula is always uH.
Thank you so much for replying.
Regards,
Derndinn
The interesting question is in fact about the derivation of approximate formulas like Wheeler or Medhurst.
Some of these are simply summarizing a series of empirical measurements, in this case there's no relation to physical units. Or they are simplifications of theoretically founded equations, in this case natural constants like μ0 or ε0 can be expected as part of the formula. All constant factors are usually combined to a single factor in an approximate formula, so you don't recognize their physical origin.