[TenTec] OT Kind of. ?? about wide band antennas

[Richards]

My research into this, including cage dipoles, suggests one may realize 
little practical tangible effect on SWR bandwidth when replacing a heavy 
wire antenna element with a small aluminum tube  (where "small" = 1-2 
inches in diameter.)    Theoretically (I believe)  it would have more 
impact on higher frequencies a the size of the element increases 
relative to wavelength.

There is some discussion of this in the ARRL Antenna Handbook.  See page 
9-4 and 2-3, et. seq.   where it discussed the impact of larger diameter 
elements on impedance.

Hope that points in a useful direction.

Happy Trails.
=======================  Richards / K8JHR  =========================

On 2/3/2011 5:30 PM, Dr. Gerald N. Johnson wrote:
> That slow change of the resistive component and rapid change of the
> reactive component is much more prominent if you look at the parallel
> admittance than the series impedance.
>
> 73