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#1
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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. First, I rely on the basic radiator as being in equilibrium which naturally points to a full wave length or reference to one period. 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. Thus the approach by Maxwell is the ultimate point of maximum efficiency where all forces are accounted for and ALL contribute to radiation. 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. 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! 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. 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. 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 |
#2
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On Sep 11, 11:47*am, Art Unwin wrote:
There has been some "talk" that the spherical radiation pattern shown via Poynting's vector is impossible or just a theoretical thing. etc etc Quoting from John Kraus' well-respected textbook "Antennas For All Applications," 3rd edition, page 74: "Although the isotropic source is convenient in theory, it is not a physically realizable type. Even the simplest antennas have directional properties, i.e., they radiate more energy is some directions than in others." The Poynting vector does not apply only to isotropic sources. Here is a link to a simple definition: http://www.britannica.com/EBchecked/...oynting-vector .. It doesn't have to describe a perfect sphere. And in fact for practical, physical antennas it never does so. FYI, Art, nowhere in that textbook does Kraus write anything about your equilibrium, tipping, Coriolis effect, or tank circuits, or their being germane to the proper understanding and/or functioning of antennas. RF |
#3
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![]() "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! |
#4
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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? |
#5
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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! That appears to be true. However I have always used Bernollis experiments with liquid as being synonamous with current flow. So to mention Bernolles findings to the question of Eddy flow appears to me to have some merit., Introduction of pressure in both liquids, current flow and air flow I would consider having some merit. I once mentioned the similarity of a mechanical pump which is designed around Bernollies experiments producing the same deflections that we see with changing cross sections of electrical conductors, which then must produce cavitation and thus eddy curwrents. Roy instantly pushed me aside on that one saying the functions are different which immediately declares the Standard forces theory as nonsense. ( Sorry about that Einstein) Gotta go. Excuse me plse |
#6
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On Sep 11, 1:55*pm, Art Unwin wrote:
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. I did, see the link below. The pattern of a full-wave antenna is far from being spherical. http://i62.photobucket.com/albums/h8...CompareArt.jpg RF |
#7
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Have a good vacation Art!
- 73 de Mike N3LI - |
#8
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![]() "Michael Coslo" wrote in message ... Have a good vacation Art! - 73 de Mike N3LI - .... and when you get back, let's see some proof that all this wacky 'new-age' theory is of any practical use to mankind. I'd be willing to bet, say, 100 UK pounds that Professor Unwin can't create an antenna in hardware that radiates isotropically, that is, over a whole sphere within, let's say +/-1 dB with respect to any chosen (but constant) polarisation. Anyone wish to up the ante? Chris PS: for those who may not be aware, there used to be someone else known as 'Professor Unwin' who was famed for talking in gobbledygook http://www.stanleyunwin.com/audio.htm |
#9
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christofire wrote:
... and when you get back, let's see some proof that all this wacky 'new-age' theory is of any practical use to mankind. I'd be willing to bet, say, 100 UK pounds that Professor Unwin can't create an antenna in hardware that radiates isotropically, that is, over a whole sphere within, let's say +/-1 dB with respect to any chosen (but constant) polarisation. Anyone wish to up the ante? Chris I'd be glad to, but there's no way to prove it. Measurement accuracy and repeatability just aren't that good, especially if you're trying to do a full 3D measurement. The closest I've seen to a 3D measurement system actually measured just one hemisphere. It was at what used to be NRAD (Naval Research and Development center) and before that NOSC in San Diego, consisting of a large (100 foot diameter if I recall correctly) rotating circular platform with a semicircular arch overhead. By rotating the platform and moving the detector along the arch, a full hemispherical measurement could be made. The models were physical scale models of Navy ships having appropriately scaled antennas. Even then, though, engineers there told me that when the measured results differed from NEC computer model results, they tended to believe the computer results. It's extremely difficult to make highly, or even moderately, accurate field strength measurements. A while back I designed an antenna for a consulting job which was simply a two-sloping-radial ground plane made with fairly wide traces on a low-loss PC board. George Brown, the inventor of the ground plane antenna, had observed an omnidirectional pattern in the horizontal plane with only two radials, but the marketing department at RCA insisted on adding two more to make it look symmetrical before selling them. Hence the ubiquitous 4-radial design. (The pattern of the 4 radial version is more circular above and below the horizontal plane, but not by a whole lot.) Anyway, I was concerned that maybe the PCB or the relatively wide, flat conductors might have a detrimental impact on the pattern circularity, so I took it to a local lab that has a high quality anechoic chamber and ran the pattern. When the plot was finished, the lab technician muttered "Holy $/!%", hit the print button, grabbed a camera, and ran into the chamber to take a picture of the antenna. Then he went around to the other folks at the lab with the picture and plot. Seems that it was circular within about a dB, better than their $10k reference antenna. The prototype, by the way, was made with adhesive copper tape and an X-Acto knife and looked as crude as it was. I can't claim that the pattern was really better than their reference antenna because small differences in positioning of the feedline (even though decoupled), the antenna, and anything else in the chamber can easily cause a couple of dB of pattern deviation. Roy Lewallen, W7EL |
#10
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On Sep 11, 2:37*pm, Art Unwin wrote:
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! That appears to be true. However I have always used Bernollis experiments with liquid as being synonamous with current flow. So to mention Bernolles findings to the question of Eddy flow appears to me to have some merit., Introduction of pressure in both liquids, current flow and air flow I would consider having some merit. I once mentioned the similarity of a mechanical pump which is designed around Bernollies experiments producing the same deflections that we see with changing cross sections of electrical conductors, which then must produce cavitation and thus eddy curwrents. Roy instantly pushed me aside on that one saying the functions are different which immediately declares the Standard forces theory as nonsense. ( Sorry about that Einstein) Gotta go. Excuse me plse David Forgot to mention. Current would not be applied to the radiator itself but only to the sheathing of homogenous particles at rest.( ie neutrinos who are part of the family of Leptons but still remain as particles) This way with opposing forces in shear which includes the bending moment or twist of the Standard Force, the chemical adhesion is broken and the particle is elevated to achieve a straight line projection with spin. In this event all electrical laws lie intact and where the resistance is solely of that of radiation to which current is applied. |
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