How Does an Electric Dipole Generator Work?

Question

Look at my very old physics book, I came across a description on EM that uses the idea of an electric dipole generator. Effectively an antenna. It almost appears as though one could stick a power cord in an electric outlet without anything attached to it (bulb, for example), and have an antenna. What's happening here? Does current flow up one wire and then back down it into the other wire. Sounds a bit puzzling. I would take there is really no dipole in the sense that there's a +/-pair. Can someone elucidate on what's happening?

Jamie · Answer

yes, more or less. hense the reason for corrected length of an antenna elliment. it flows down the surface of the elliments and then returns. the idea is to match it properly so that incoming energy and returning energy timed correctly to give the proper loading effects(EMF generations); etc.. i have a nice PDF guide that covers antenna theory and i think it covers your topic very well if you wish to have it.

W. Watson · Answer

Look at my very old physics book, I came across a description on EM that uses the idea of an electric dipole generator. Effectively an antenna. It almost appears as though one could stick a power cord in an electric outlet without anything attached to it (bulb, for example), and have an antenna. What's happening here? Does current flow up one wire and then back down it into the other wire. Sounds a bit puzzling. I would take there is really no dipole in the sense that there's a +/-pair. Can someone elucidate on what's happening?

Miles Harris · Answer

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puzzling. I

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It would have to be an exceedingly ***long*** dipole to efficiently radiate 60Hz. But such low frequencies *do* propagate through space if given the chance. They're just not normally used, due to the exceptionally long wavelength!

Kevin Aylward · Answer

Oh dear...This last sentance is like one one those "experts" on tv shows telling us black is black because it is black.

A more usfull statment would be:

Low frequencies are not normally used because it is difficult to transfer power to the antenna. This results in low transmissinon distances.

or

Low frequencies are not normally used because the data rate that can be transient is low.

Kevin Aylward snipped-for-privacy@anasoft.co.uk

formatting link

SuperSpice, a very affordable Mixed-Mode Windows Simulator with Schematic Capture, Waveform Display, FFT's and Filter Design.

W. Watson · Answer

the appears as attached current puzzling. I someone I forgot to mention that my house is wired for 120v and 6MHz. :-)--               Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)                  (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)                   Obz Site:  39° 15' 7" N, 121° 2' 32" W, 2700 feet                         Web Page:

W. Watson · Answer

Sure. Is it something on the web?--               Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)                  (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)                   Obz Site:  39° 15' 7" N, 121° 2' 32" W, 2700 feet                         Web Page:

How Does an Electric Dipole Generator Work?

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How Does an Electric Dipole Generator Work?

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