Actually, the situation *never* occurs. Any practical transmission line impedance is complex (reactive), hence a purely resistive load is not a complex conjugate.

BTW, Zo and Vp vary with frequency too, making the situation even more "complex", pardon the pun.

Wes N7WS


On 7/31/2014 4:20 PM, Fred Jensen wrote:
[snip]

If the feedpoint impedance of your antenna is totally resistive, *and* is exactly equal to the characteristic impedance of your feedline, then length only matters when calculating loss. This situation hardly ever occurs for any real hams however. :-)

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