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Old July 25th 03, 02:29 AM
Richard Harrison
 
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Cecil, W5DXP wrote:
"What does Terman say in Sec. 4-11?"

I gave a verbatim response from 4-11 at 11:03am on Jul. 17, 2003.

I`ll add the footnote from page 109:
"Another way of expressing this situation is to say that the stub
position and length are so selected that the input impedance of the line
(l1) shunted by the input impedance of the stub-line (a) will equal the
characteristic impedance Zo." (l1 is the length of line between the stub
and ZL. Fig. 4-17 provides position and length of the stub vs. SWR.

The conclusion is that a match is achieved so there is no reflection on
the transmission line. The match has eliminated the reflection which was
there during the transistion period, but no longer appears there during
the steady state. Your Bird wattmeter will show a forward power but no
reflected power because the load with its stub provides a match to the
transmission line.

Best regards, Richard Harrison, KB5WZI