I probably should have been a little more specific; there are some special case
exceptions.
Roy Lewallen says on page 6-15 in my 22nd Edition of the ARRL Antenna Book:
"The only cases in which the current (or voltage) delay is equal to the
electrical
length of the line are
1) When the line is flat; that is, terminated in a purely
resistive load equal to its characteristic impedance;
2) When the line length is an integral number of half
wavelengths;
3) When the line length is an odd number of quarter
wavelengths and the load is purely resistive; and
4) When other specific lengths are used for specific load
impedances."
Wes
On 5/3/2018 9:24 PM, Richard (Rick) Karlquist wrote:
Isn't it true that for lines that have a length
that is any multiple of a quarter wave,
the phase shift when matched is the same as when mismatched?
Otherwise, (1) is correct AFAIK.
Rick N6RK
On 5/3/2018 9:06 PM, Wes Stewart wrote:
Another point or two and then I'll shut up.
1) The expected phase shift in a line is only achieved when the line is
matched.
On 5/3/2018 7:28 PM, Wes Stewart wrote:
Quarter wavelength lines have the magical property that the output current
is equal to the input voltage divided by the line Zo. So with multiple
inputs tied together, and obviously having the same voltage, the output
currents will be equal.
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