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Old May 21st 07, 02:51 AM posted to rec.radio.amateur.antenna
Cecil Moore[_2_] Cecil Moore[_2_] is offline
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First recorded activity by RadioBanter: Mar 2007
Posts: 3,521
Default Standing wave on feeders

Richard Harrison wrote:
David wrote:
"Antenna is resonant and presenting good impedance. SWR is 1:1.
If the feeder is coax, is there a standing wave on the coax?
If the feeder is open wire, is there a standing wave on the feeder?"


SWR is 1:1 means the line is flat. The line matches the antenna
regardless of configuration. There is no reflection from the load.
Standing waves are produced by a combination of a reflected wave with
the incident wave. No SWR means no reflectiion if coax, open wire, or
any other feedline configuration is in use.


Perhaps what David is actually saying is that the
50 ohm SWR meter reads 1:1 in both cases?

If a 50 ohm SWR meter reads 1:1 looking into open-wire
line, there is an SWR on the open-wire line of ~12:1,
i.e. 600/50.
--
73, Cecil http://www.w5dxp.com