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On Sep 11, 1:04*pm, "Dave" wrote:
"Art Unwin" wrote in message ... There has been some "talk" that the spherical radiation pattern shown via Poynting's vector is impossible or just a theoretical thing. There are many things that point to this such as point radiatiion as well as not being a realistic concept. I offer the following as an opposite aproach for the news group. of course you will... that doesn't make it right, or even logical. First, I rely on the basic radiator as being in equilibrium which naturally points to a full wave length or reference to one period. only in your brain since none of us understand your constantly changing explanation of what equilibrium is. Secondly, I point to a radiator as being the circuit of a tank circuit which is essentially perpetual motion if one removes the frictional aspect. ah, perpetual motion, now we are getting somewhere! Thus the approach by Maxwell is the ultimate point of maximum efficiency where all forces are accounted for and ALL contribute to radiation. maxwell's equations have nothing about gravity, the weak force, or the strong force, or efficiency included in them... From the above it is natural that a radiator is tipped to equal the outside vectors of the arbitrary boundary which are gravity and the Coriolis effect. the Coriolis effect is not a vector nor a force, it is a method of explaining what someone on a rotating sphere thinks they see... purely a figment of your imagination. We then have to allow the radiator to have near zero resistiveness such that all input power is used solely for radiation ( super cooled I suppose) From this approach we can state that, in the limit of zero resistance all power is converted into radiation! this one statement may contain some small smidgen of reality... you are slipping art! Thus if we have a radiator of one WL that is tipped in space and of near zero resistance in the impedance metric we will then attain a spherical radiation pattern as with Poynting's vector and thus a demonstration of point radiation together with *further evidence that radiation is of a particle and not one of waves. nope, sorry, still won't work. *it will still have the distorted doughnut pattern. By the way, since the phenomina of radiation is created solely by the electo-magnetic and electro-static fields per the tank circuit it becomes very clear that radiation is not continuous but in "packets or "pulses" because of the momentary stop as shown at the center of a sine wave. you have been listening to that other kook too much and have picked up his signature pulses... next you'll be talking about speakers and pressure wave interference to explain your equilibrium. When I get back I look forward with interest how the group tries to counter above with presently known facts or the common retreat to insults or just rest comfortably assured that the prior postings explain all. See you all later and have a great week end insults are so much more fun than trying to educate the insane! David The idea is accountability for all forces. If you model for 100% radiation without losses you get a spherical pattern, no doubt about it. With respect to the choice of a WL radiator this is because it represents a period which classical physics demand. If one chooses 1/2 WL then you are using a fudge factor since one cannot avoid overshoot or the use of time just to obtain an impedance that mankind feel is better. Overshoot is a matter of correction by a circuit with the correction getting smaller and smaller but always with the inevitable corrections This then allows the cross over point of a sine wave to aproach, but never arrive, at the center representing a 1/2 WL. Now I have modeled the above aiming for zero for a resistive value in the impedance because that is the way programs are set up ,which is fine by me, as it supplies a truly spherical pattern just prior to the pattern moving away from a transmit to a recieve function On a separate note. Just because something is not mentioned in a book does not provide mention of such points to be false, only to the fact that the author has not fully completed his studies. There is no such thing of a book that explains all in it entirety, only different versions of plaguerisation, Failing that it shows that the ham fraternity considers "all is known" about radiation and complely discardes the notion of current possibly being ABOVE the surface of a radiator when the environment allows it to happen or even the presence of negative impedance with respect to a element with a time varying field e.t.c. otherwise it would be mentioned in a book Ofcourse there will be protests that certain things such as zero resistance cannot be otherwise electrical laws will have to be modified! Well that has proved to be normal when looking at history so shall we suppres it? |
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