Just a theory Antennas
- StormShadow
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Just a theory Antennas
So you'd have a UHF dipole now compare that with a 40 meter dipole? I'm talking about the thickness of the elements so for example a 70cms dipole is small with thicker elements that you'd have a 40 meter dipole antenna with thin elements... Now this is my theory, having a chunky 40 meter dipole with thick elements, I'm talking at least 2 foot thick elements this will have better performance that a standard wire dipole right?
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Re: Just a theory Antennas
A 40m dipole with 2ft thick elements? You'd need a leccy pylon to keep it in the air.
As you're talking theory, then the performance shouldn't be any better than a wire dipole at the same height, but the advantage would be that you could probably put 500kw through it whereas the wire would burn up at around 1kw.
As you're talking theory, then the performance shouldn't be any better than a wire dipole at the same height, but the advantage would be that you could probably put 500kw through it whereas the wire would burn up at around 1kw.
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- StormShadow
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Re: Just a theory Antennas
Its interesting tho. I made a 2 meter wire dipole when I was first licensed from speaker wire and performed crap. I then tried thicker wire and the performance improved, then when I made a dipole from copper pipe later on that worked even better so I reckon the thickness has some part to play in the performance.
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Re: Just a theory Antennas
Somebody please tell me that my theory is wrong in regards to thickness of antennas having more performance? I need a few more opinion's to put my mind at rest
Re: Just a theory Antennas
RF travels on the outside (surface skin effect) of the conductor, like any AC voltage however a larger diameter will give a slightly wider bandwidth.
- dt307
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Re: Just a theory Antennas
as above the only advantages of thicker elements is
more bandwidth
more power handling
can be made to be self supporting ie 10m dipole
more bandwidth
more power handling
can be made to be self supporting ie 10m dipole
163dt307-chris
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Re: Just a theory Antennas
A practical "thicker elements" antenna is here:
http://www.tc2m.info/TC2M%20HF%20Vertical%20G8JNJ.pdf
http://www.tc2m.info/TC2M%20HF%20Vertical%20G8JNJ.pdf
... www.M0RZF.co.uk ...