[TenTec] Bazooka antenna.. More than you wanted to know!

[Dr. Gerald N. Johnson]

On Fri, 2008-06-06 at 18:58 +0100, Steve Hunt wrote:
> Just to be clear: what gives a folded dipole a slightly greater VSWR 
> bandwidth is NOT the "fold" - that simply causes an impedance 
> transformation. It's the presence of the spaced second wire that makes 
> it behave like a "fatter" dipole.
> 
> You can get exactly the same bandwidth improvement by including the 
> second wire but omitting the "fold". What I mean by that is: break the 
> second wire at the centre and connect each side to the feedpoint. You'll 
> get the same bandwidth improvement, you wont have to worry about 
> transforming from 300 Ohms to 50Ohms, and the "fatter" dipole will be a 
> slightly better match to 50 Ohms than a thinner dipole.
> 
> 73,
> Steve G3TXQ

And you will get nearly all that bandwidth improvement if only the outer
10% of the antenna is doubled and spaced.

73, Jerry, K0CQ