[K3PZN-List] Wire antennas
Scott, KB3JQQ
kb3jqq at yahoo.com
Mon Mar 28 22:10:23 EDT 2016
That's windoM not window
- Weird words are due to my iPhone correcting me wrongly! -
> On Mar 28, 2016, at 22:08, Scott, KB3JQQ via K3PZN-List <k3pzn-list at mailman.qth.net> wrote:
>
> A G5RV and a Carolina Window are both Off Center Fed (OCF)dipoles fed by a certain amount of ladder line. In theseantennas, the feedline is part of the antenna and the match.
>
> From: Curt Milton via K3PZN-List <k3pzn-list at mailman.qth.net>
> To: Carroll County Amateur Radio Club <k3pzn-list at mailman.qth.net>
> Cc: Curt Milton <wb8yyy at yahoo.com>
> Sent: Monday, March 28, 2016 9:55 PM
> Subject: Re: [K3PZN-List] Wire antennas
>
> Kyle
> the shape of the antenna has some influence on the radiation pattern. however, for HF antennas mostly or partly horizontal -- the presence of the earth below can reduce the directional pattern of the antenna.
>
> a dipole that is straight, and more than a half wavelength above the ground will have a figure 8 type pattern, with less RF pointed along the axis of the antenna. an inverted V will be less directional.
>
> circle antennas? I don't know how common a circle is on HF. a loop of wire that is square or a circle that is about one full wavelength total circumference will make a nice antenna also. they will have a slightly louder signal close-in. they have interesting properties at higher frequencies (where the antenna can be matched). are you thinking of a circle parallel to the earth?
>
> back to Jim's earlier comment -- you can have a blast with most any good, simple antenna. the complication is feeding it with a long piece of coax -- the coax feed only works well when the antenna is nearly matched in impedance (aka low enough VSWR).
>
> on the dipole -- its popular because its easy to feed with coax. now if you take a dipole and move its feedpoint off center - it no longer has the same match (or impedance) so it can be problem unless addressed by the design of how it is fed.
>
> many antenna possibilities -- both radiating pattern and feed impedance must be considered.
>
> 73 Curt
>
>
> On Monday, March 28, 2016 8:55 PM, Kyle Thornton <kyle.3599 at outlook.com> wrote:
>
>
> Hi all,
> Another question from my curious mind. How exactly do wire antennas and inverted Vees work. Can I put the legs anywhere or do they have to be in a straight line? What are these circle antennas are they any good?
> Kyle
> 73 de KC3FMP - FM19KJ
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