Yes, Doug, but almost ALL of the reflected energy is reflected back UP
the coax, to the antenna and radiated, and with each trip down, up, and
radiated, the vast majority of RF IS
RADIAATED, even with high SWR, on the HF bands, and with reasonable coax.
So the "loss" due to reflections at HF is miniscule, and can be ignored,
except with respect to the impedance presented to a fixed output (as in
solid state) final. A good antenna tuner will take care of that....
73, DX de Pat, AA6EG/N6IJ
"The Contest Station from the Government"
Marina Amateur Radio Contest Station; N6IJ
599 DX Drive
Marina CA 93933
aa6eg@tmx.com
On Tue, 21 Jul 1998, DOUG WALLER wrote:
>
> Yes, but remember, impedance mismatches reflect some energy back down the
> feeder that could have been radiated by the antenna. Doug - Nx4d
>
> Jim Reid wrote:
>
> > -----Original Message-----
> > From: George T. Daughters <gdaught6@leland.Stanford.EDU>
To: <towertalk@contesting.com>
> > Date: Tuesday, July 21, 1998 5:53 AM
> > Subject: Re: [TowerTalk] Steve's antenna study
> >
> > steve wrote...
> >
> > <big snip>
> >
> > > So you can get high performance (gain) IN SPITE OF high swr.
> >
> > this shouldn't be a surprise. but it sure bears repeating!
> >
> > Yes, George, What gives an antenna gain has NOTHING to
> > do with the impedance of the antenna. The impedance
> > relative to the impedance at the end of the amateurs
> > transmission line out the the antenna is from where
> > vswr comes. Gain comes from the geometry of the beast.
> >
> > 73, Jim, KH7M
> >
> > --
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>
>
>
>
> --
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