Just a theory Antennas

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StormShadow
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Just a theory Antennas

Post by StormShadow »

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

Post by Admiral »

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.
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StormShadow
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Re: Just a theory Antennas

Post by StormShadow »

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

Post by StormShadow »

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
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Re: Just a theory Antennas

Post by 2E1IIP »

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.
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Re: Just a theory Antennas

Post by dt307 »

as above the only advantages of thicker elements is
more bandwidth
more power handling
can be made to be self supporting ie 10m dipole
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Re: Just a theory Antennas

Post by theEarwigger »

A practical "thicker elements" antenna is here:
http://www.tc2m.info/TC2M%20HF%20Vertical%20G8JNJ.pdf
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