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![]() wrote ... Szczepan Białek wrote: wrote ... Szczepan BiaĹ?ek wrote: "Cecil Moore" wrote ... Szczepan BiaĹ?ek wrote: But what radiate 1/4 wave antenna (mast) with the one end only? Is the radiation polarized? Why not download the free demo version of EZNEC from www.eznec.com which will tell you that the radiation from a 1/4WL vertical monopole is primarily vertically polarized. What means "primarily"? Is in reality an antenna which radiate unpolarized radio waves? S* That you would use the term "unpolarized radio waves" shows you haven't a clue what you are talking about. http://en.wikipedia.org/wiki/Polarization Are you sure that radio waves are transversal? We are trying to find how the dipole works. The are the two possibilities: 1. Dipol radiate the Maxwell's wave from the centre, 2. The two ends radiate the two pressure-like electric waves. What do you prefer? That you not post your babbling crap here. Read the link I provided, then read the links it provides. I am not interesting in theoretical physics. There are about 100 years of experimental measurements that say how a dipole works, which is the entire dipole radiates. In the last 100 years the experimental measurements show that the feed line (the two wires where something oscillate) do not radiate and that the two bended ends radiate. This ends you call "entire dipole". Todays dipoles are simply the two coupled monopoles. The only one really dipole was the original Hertz apparatus. There no feed line. There is the discharging of capacitor which is charged from tiet to time. Se: http://people.seas.harvard.edu/~jone...Hertz_exp.html There is wrote: "According to theory, if electromagnetic waves were spreading from the oscillator sparks..." The oscillator sparks are in the centre. At the ends are the capacitor plates. What radiates? The sparks or the plates? Experiments show that radiation from the original Hertz dipole and from todays two coupled monopoles are polarized. (in sense that the receiver antennas work better if are parallel to the dipole). Now portable radios and many others aplications work in each orientations. My question is simple: What type of emmiting antennas are used in such applications? Are they monopoles? S* |
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