Actually, antennas need TRAVELLING waves to radiate. Standing waves are a
secondary effect in some (just about all practical) antennas which cannot
happen without travelling waves - think about it! Antenna efficiency is another
matter altogether related to many different factors.
73 Roger
VE3ZI
--- On Thu, 8/4/10, Carl <km1h@jeremy.mv.com> wrote:
> From: Carl <km1h@jeremy.mv.com>
> Subject: Re: [Amps] Hmmmm...Legal limit boiled the oil in the cantena
> To: ve3zi@rac.ca, amps@contesting.com
> Date: Thursday, 8 April, 2010, 20:42
>
>
> > "Standing waves on the antenna are necessary for it to
> radiate. They are
> > not
> > necessary to transfer power from the plate of the
> tube.
> >
> > I hope that Bill Orr book arrives soon.
> >
> > 73
> > Gary K4FMX"
> >
> > So that is why rhombics and other travelling wave
> antennas don't work?
> >
> > :-)
> >
> > 73 Roger
> > VE3ZI
>
>
> Unterminated ones have high standing waves while terminated
> ones burn half
> the RF in the resistor. Anything can be made to radiate and
> even show gain
> if it is big enough.
>
> Carl
> KM1H
>
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|