Topband: Fano limit (was: Re: 50 ohm direct burial coax cable‏)

[Richard (Rick) Karlquist]

On 6/14/2014 6:53 PM, Hardy Landskov wrote:
> Don,

> So now there are two variables that you can't really do anything about.
> Therefore, the 2:1 bandwidth narrows the more frequency dependent
> variables there are in the matching network. There is a paper which was
> written by Fano which comes to the conclusion that about 4 matching
> elements is the practical limit of wideband matching. Anyway please
> Google: "Fano"  and I am sure you will find a lot of info if you are
> interested.
>

See the definitive treatment of this topic by K6OIK here:

https://www.fars.k6ya.org/docs/Bode,Chu,Fano,Wheeler-Antenna_Q_and_Match_Bandwidth.pdf

Also, a lot of other great articles by K6OIK.  This guy is good.

Rick N6RK