Bob Guercio
New Member
Hi All,
In a lossless system where there is a mismatch at the antenna/transmission line junction, the rf energy is reflected back and forth between the antenna and the transmitter. At each reflection, a bit more of the energy gets radiated until all 100% of it is radiated. There is absolutely no loss of rf energy in a perfectly lossless system despite the fact that the SWR on the transmission line is not 1:1.
It is for this reason that with a low loss transmission line, such as ladder line, a high SWR reading can be tolerated as long as a tuner is used. The 100% rereflection is then accomplished at the tuner/transmission line interface.
Could someone please explain to me what is happening at the transmitter/transmission line junction or at the tuner/transmission line junction to cause this to happen? How does the transmitter or tuner do this?
Thank you,
Bob Guercio
In a lossless system where there is a mismatch at the antenna/transmission line junction, the rf energy is reflected back and forth between the antenna and the transmitter. At each reflection, a bit more of the energy gets radiated until all 100% of it is radiated. There is absolutely no loss of rf energy in a perfectly lossless system despite the fact that the SWR on the transmission line is not 1:1.
It is for this reason that with a low loss transmission line, such as ladder line, a high SWR reading can be tolerated as long as a tuner is used. The 100% rereflection is then accomplished at the tuner/transmission line interface.
Could someone please explain to me what is happening at the transmitter/transmission line junction or at the tuner/transmission line junction to cause this to happen? How does the transmitter or tuner do this?
Thank you,
Bob Guercio