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Part 2 Is it possible to ask questions here?
On 10 Nov, 19:17, "Mike Kaliski" wrote:
"art" wrote in message ups.com... It has been stated on this antenna newsgroup that with short antennas the current goes up the radiator and then turns back and goes down. If this is so then it must be radiating all the time, yes? If a radiator is radiating all the time then the efficiency is the same as a full leght antenna. Yes? This does not conform with reality Right? So is it possible that the circuit (current) returns along the path down the center of the radiator which is bordered by decaying electrons which thus would prevent radiation? IF it was possible then radiation figures accepted by hams would coincide with respect to short antennas. Yes?. Then why do all the "experts" reject the notion of the circuit continueing down the center of the radiator? What exacly preventing such a circuit becoming a reality? Why does current go up the radiator in the first place knowing it has nowhere to go? Just a silly question for the self perceived experts Best regards and waiting in unabaited attention to responses by the experts, as I can't find it in the books which tell all that is known. Your friend and eager listener Art KB9MZ.....XG Art You should know better (and I should know better for responding). :-} The signal going down the centre would cancel the signal going up the outside and nothing would be radiated except heat due to the electrical impedence and resistance of the antenna conductor. What keeps the two paths separated? A simple experiment with a length of solid copper rod and a similar length of copper water pipe will demonstrate that what you suggest doesn't in fact happen. Both will display similar radiation characteristics and no sign of reverse current flows down the centre of the rod or the inside bore of the tube. The only difference in characteristics will be caused by a difference in the outer dimensions of the copper rod and tube. At high enough frequencies, the tube will act as a waveguide, but that's a completely different matter altogether. Why does a light bulb glow? How do the photons know what direction to travel in? If electrons are raised to a higher energy level (usually referred to as moved to occupy a higher orbital shell) by the input of energy, after a short period, they will return to their original energy state, emitting a photon to carry away the excess energy. The energy of the photon being directly in proportion to the energy input in the first place. This has been verified repeatedly in published laboratory experiments. The photons are emitted at around 300,000 Km/sec at right angles from the surface of the conductor. They don't need to 'know' which way to go or to be sucked out by some mystic force. Neither do we need degenerate or decaying electrons to direct the flow. An electron is an electron and nothing else. All electrons are inherently the same. When they form part of an atom, they can absorb or emit photons to balance the energy in the atom. The photon is not part of the electron, it is just the manifestation of temporarily stored, excess energy, being emitted to restore the atom back to its lowest energy state. Mike G0ULI- Hide quoted text - - Show quoted text - Mike I want to wait until some of the others present there thoughts but one thing I have to comment on. The term is an electron is an electron and nothing else! I won't argue on the nomenclature of an electron but must point out that an electrons has different properties! You can have an electron that is bound to an atom via it's orbit and that word bound cannot be underestimated. You can also have free electrons that attach themselves within to what we understand as matter.You can also have static particles where there are several states of decay right down to a particle with chemical atributes but no electric atributes. Now everybody brings photons into this picture that I will not comment on but as far as electrons one must state the electrons status before debating property changes that some suggest are foisted upon them.Lets wait to see what the others present though you didn't refer to the fact that if the circuit is always on the surface with respect to time then the radiation should be the same as a full size radiator. But that can wait. Somebody may yet refer to a description from a book ! Best regards Art |
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