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On 30 Jun, 03:04, "Dave" wrote:
"art" wrote in message ps.com... On 29 Jun, 17:12, "Dave" wrote: "art" wrote in message groups.com... On 29 Jun, 14:18, "Dave" wrote: "art" wrote in message roups.com... On 29 Jun, 12:11, art wrote: On 29 Jun, 11:50, "Dave" wrote: "art" wrote in message oups.com... On 29 Jun, 07:02, art wrote: On 25 Jun, 13:10, "Dave" wrote: Ok, lets try it this way... step by step, inch by inch, we may yet figure out what this antenna is. First question: What is the least number of wires needed to build a gaussian antenna? Posting check Art Isaac Newton like scientist before him observed the World and the Universe for clues about what it was all about. He determined that each particle, each object, each planet all had their own gravitational centers. And where each minute particle was made of atoms etc all orbiting around each other in a state where these orbiting partcles were able to move in isolation with respect to other particles in orbit because all forces became balanced with respect to each other. This theory was based on observations on the make up of the universe around us. This balancing of parts and particles is called being in a state of equilibrium. If an exterior force was applied the Universe has a whole would rearrange itself to retain equilibrium by accomodation Thus we can see an element as something held together by equilibrium and where its constituent parts is a densily packed swarm of particles shaped in longitudinal physical form and where the surface of this entity has its surface completely covered by errant particles called electrons. This collection of particles are so densly packed that it appears to be a solid and where the make up of its constituent particls and atoms provide a distingtive appearance which allows identification with respect to other combinations of densly packed swarms of particles and atoms via weight, reflective qualities e.t c I have stated the above in a very generalistic way purely to give an understanding of the meaning of the word "equilibrium" which in a generalistic way can be seen as a somewhat stable existance of parts in concert with other parts in a three dimensional existance where its "stable" existance is created because of the totalility of all forces involved equals the sum of ZERO. Art Unwin KB9MZ....XG but an antenna is by necessity a dynamic thing. it is meant to be radiating or absorbing energy which to me means it can not be in equilibrium. it also must have rapidly varying currents and voltages such that even along the length of the wire there is no equilibrium, electrons pack up tighter in one area and less in another forcing currents to flow continually. even a wire that is not directly fed from a transmitter has currents and voltages based on how close it is to a wire driven from a transmitter, it's orientation, and it's length. electrically if all the fields from a wire summed up to zero there could be no power flowing and hence no antenna.- Hide quoted text - - Show quoted text - I fully understand your quandry David because with your knoweledge despite what you say is trying to jump ahead of the story to get at the desired end. Just relax and follow my story without resistance as a child without prior knoweledge would when he is sitting down and listening to an orator describing a story. The point of the story is at a point of arranging two pieces of metal that has no external forces exacted upon them and where each piece of metal can be seen as a static part of the earth even tho it is made of zillions of gyroscopes spinning in a comppressed area and that because of the balanced rotation of parts are staying together as a swarm of parts without disintergration to dust. You have to understand the nature of mass or energy of things so you can anticipate the reaction to an external force that impinges on its equilibrium . Until that happens we are reffering to an arrangement that is not dynamic but static Art Unwin KB9MZ...XG- Hide quoted text - - Show quoted text - David, let me talk about equilibrium a little bit more as the lessons learned from many years on this newsgroup shows this to be a real stumbling block. For someone with a learned background there is a great emphasis on the mathematical side of proving concepts that were origional derived by observation of the universe where the student of the day concentrates more on the mathematical aspect which is required for a non oral examination. Thus it is natural for such a student to equate the "equal" term in mathematics to the word "equilibrium" Equilibrium can be used as an "equal" sign but certainly not always and again the "equilibrium" term cannot be interchanged easily with the term "equilibrium" As the Russian has pointed out that we have altered the path of science by being led by mechanical machines in number crunching style where numbers are placed into a grinder and where we examine the mix to see if anything usefull comes out and where the computor is used to magnify possible paths where the resulting mix in general goes no where. You now have to put another hat on and rely on that bit by bit observations becomes a story and where bits are missing you use intuition to bridge the gap that is consistent with the theme. It is later that mathematics comes into the picture where we check to see if there is a common realistic theme. Maxwell did this by collecting different stories and connected them by trails of a story into numbers and though he saw a connection between a static sbject and a dynamic subject he never accumulated enough clues to develop a story to match the mathematics. What we are doing now is going back in time using observations of the universe to form a story even tho the mathematical links are some what preknown as individual parts as those observers of the past would do by deduction and without the use of a computor Hope that helps rather than confused you but we are retracing the step in the past taken by Gauss. Art Unwin KB9MZ......XG Back to mowing the grass or.....coooo dee graaaar but what is in equilibrium when this single resonant gaussian element is fed with rf and is radiating?- Hide quoted text - - Show quoted text - David, Now it is you that is jumping to fast. Let us go back to the last place where you said not to fast. We were looking at what is termed a Gaussian field with the standard "pillbox" where inside are located some statitic particles. Pick up a book and bone up just in this area since this drawing is commonplace but add to the drawing an outline of two elements where the surface of which have the static particle resting. Gauss talks about this picture a lot but he was not aware of such things as antennas only static particles where we know better than that because elements have static particles that rest on the surface of conductive items on this earth and we will want to deduce how these particles react when given an electrical shock since we know that most people jump when they come into contact with it. Bone up on Gausses law of staics and the pill box picture that one associated with that law. Don't forget that the elements that we are adding to this drawing is in effect a bunch of- Hide quoted text - - Show quoted text -... read more » O.K. Let us back up for simplicities sake and place only one element inside the Gaussian field with the static particle resting on it's surface. Here we can see a similarity to Pointings Theorm which also has an element inside a circle and where Poynting introduced the energy in vs energy out equation to produce a mathematical equation of the concept of energy applied to an element and equated it to energy out in the form of Radiation. Thus even tho we are pursuing the same thing using Gaussian law of statics bothmethods ar pursueing the same final results. Thus Poyntings vector gives us a mathematical standard which cannot be abused even though we are proceding from a statics point of view. And we will point to this mathematical standard as we move along. Back to the Gaussian field where we decided to apply a jolt of electricity to the enclosed dipole. When this is done we know that two fields are produced around the element, one in the direction parallel to the applied electrical current and one at right angles to the flow of the electrical current. We thus can add two vectors to the dipole as we know the directions that they take. With respect to the length of the vector the length must be zero on all accounts because what we are comparing to i.e. Poyntings theorem does not have the metric of time. However we do now have a conservative field with its vectors tho of zero length and if we take a step further we can use just one vector in the region of 45 degrees as a summation of the original two vectors. This provides a surprise.This is stating that the direction of radiation is not at right angles to the radiating element in it's natural form! From this we can make our first deduction. When pursuing a given pure polarisation of a radiation field the radiator must be at an angle somewhere between parallel and the right angle position to the radiator. This is a very important observation .....It tells us that the idea of parallel elements for radiation as per a Yagi is really a distortion of natural radiation from a energised radiator . One needs to take time and think about this implication. Art Unwin KB9MZ.......XG |
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