[Antennas] 468/Freq in Mhz

Sun Aug 23 17:10:47 EDT 2009

There are numerous issues that haven't even been hinted at!
Let's say that you are going to do a dipole with a single feedline. If 
you use multiple elements for different bands, then the feedpoint 
impedance rises rather rapidly. Hence the use of baluns.
It would seem that since someone is asking about #14, we are talking 
about a dipole or end fed wire.
When you start thinking in terms of 1" aluminum tubing, then it is 
either a vertical or one HECK of a horizontal antenna.
In any event, the REAL question that is involved but yet to be posted, - 
What frequency are we talking about?
I'd love to be able to support 1" tubing for an HF antenna on 
frequencies lower than 20mtrs! Skin effect is an issue even down that 
low, but we compromise because the length gets in the way! How does one 
support 1" tubing on 80 or 160mtrs in a horizontal antenna?
Bob - N0DGN
Hue Miller wrote:
> ...#14 wire will radiate as well as tubing...only the Q will be lower
>>> and BANDWIDTH will be lower...but a wire antenna has a B/W of 10% of
>>> so of
>>> freq..so the higher you go, the wide the bandwidth of the antenna (say
>>> a
>>> normal 1/4wave gnd plane) BUT there is NO performance improvement....
>>>> Wait a minit. The wider element will have the wider bandwidth.
> I think this applies until your wire antenna has really small wire
> (higher DC
> resistance) or is made out of resistance wire. Then the the wire antenna
> (compared to tubing) WILL have wider bandwidth BUT higher resistive loss
> also. -Hue Miller
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