[TowerTalk] Circuit Board Question

[Steve Hunt]

Yes, the voltage maxima are coincident with the current minima, so 
maximum dielectric loss will be coincident with minimum copper loss. How 
much those two offset each will obviously depend on their relative 
magnitudes.

As a numerical example: a 50 Ohm line with a 2:1 SWR will have maximum 
voltage where the impedance is 100 Ohms resistive; that's also the point 
of minimum current. A quarter-wave away from that point the impedance is 
25 Ohms resistive - that's the point of minimum voltage/maximum current.

Steve G3TXQ



On 02/08/2014 23:22, Jim Lux wrote:
>
>
> My off the cuff question was more along the lines of "are the current 
> maxima at the same place as the voltage maxima":  that is, is max 
> dielectric dissipation going to occur at the same place as max copper 
> loss dissipation, or are they going to be, say, 90 degrees apart.
>