On Fri, 24 Oct 2008 09:48:43 -0400, Michael Coslo
wrote:

I've been working with mobile antennas for the past several months, and
I might be going astray, because I keep thinking about increased
bandwidth as a partner of lowered efficiency. Not likely the case here.

Hi Mike,

Only if you think of the vehicle body as the fat radiator and the
"mobile antenna" as a tuned radial. Unfortunately, that tuned radial
restricts the capacity of the fat radiator to achieve wide band
operation. Wide bandedness is a function of the complete system.
Unfortunately most look at the "radiator" and miss the necessity of
the counterpoise which demands an equally "large" contribution.

73's
Richard Clark, KB7QHC

Richard Clark wrote in
:

On Fri, 24 Oct 2008 09:48:43 -0400, Michael Coslo
wrote:

I've been working with mobile antennas for the past several months, and
I might be going astray, because I keep thinking about increased
bandwidth as a partner of lowered efficiency. Not likely the case here.

Hi Mike,

Only if you think of the vehicle body as the fat radiator and the
"mobile antenna" as a tuned radial. Unfortunately, that tuned radial
restricts the capacity of the fat radiator to achieve wide band
operation. Wide bandedness is a function of the complete system.
Unfortunately most look at the "radiator" and miss the necessity of
the counterpoise which demands an equally "large" contribution.

Agreed. while messing with my installation, I spent much more time with
bonding all my vehicle - did you know a Suzuki Vitara has an actual frame?
Many dozens of braid straps. It was all worth it though.

- 73 de Mike N3LI -