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