What actually happens?
What I seek is a graphical / pictorial representation of
the growth and collapse of fields around and antenna as it radiates. A corollary being the question that if the local inductive and capacitive fields collapse and regrow on every half cycle, why does not the radiative field also collapse back? What causes them to radiate outwards? Despite having (at some time, 45+ years ago) studied up to the differential versions of Maxwell's Equations, this (hopefully) elementary explanation has eluded me. A picture paints a thousand words, and like Richard Feynman before me, I can soar with the eagles with the highest science but I need a seat-of-the-pants understanding upon which to anchor my knowledge. eg, I once had a problem coming to terms with the Vector Magnetic Potential A, but understood it when standing a bit close to the edge of the platform as a railway train went past creating little eddies of wind! |
What actually happens?
On 20/04/2018 21:10, Gareth's Downstairs Computer wrote:
What I seek is a graphical / pictorial representation of the growth and collapse of fields around and antenna as it radiates. A corollary being the question that if the local inductive and capacitive fields collapse and regrow on every half cycle, why does not the radiative field also collapse back? What causes them to radiate outwards? Despite having (at some time, 45+ years ago) studied up to the differential versions of Maxwell's Equations, this (hopefully) elementary explanation has eluded me. A picture paints a thousand words, and like Richard Feynman before me, I can soar with the eagles with the highest science but I need a seat-of-the-pants understanding upon which to anchor my knowledge. eg, I once had a problem coming to terms with the Vector Magnetic Potential A, but understood it when standing a bit close to the edge of the platform as a railway train went past creating little eddies of wind! It may be interesting to apply a semi-graphical method; I was introduced to one example way back in the mechanical content of my electrical engineering studies - http://rspa.royalsocietypublishing.o...0/329.full.pdf Now I'm sure an erstwhile polymath could work something like this for e-m waves. -- --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
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