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#19
September 9th 09, 04:11 AM
posted to rec.radio.amateur.antenna
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The ultimate tilted monopole
On Sep 8, 8:19*pm, Art Unwin wrote:
On Sep 8, 6:49*pm, Richard Fry wrote: On Sep 7, 6:44*pm, "christofire" wrote: ... and if that isn't enough, how about the Racal Antennas athttp://www.racalantennas.com/products/ground/omnidirectional/hf/difan... I just now looked at this link, and see that it states that this radiator configuration is horizontally polarized. That polarization appears to be "implausible" for this configuration. Does any scientific documentation exist, or do any measured, real- world performance results prove that this configuration truly is horizontally polarized? RF You are so dumb! Look at the center pole as being a vector in opposition to the gravity vector. Then add the two tilted vectors which represents the vectors of the Coriolis force. (Yes, you add both of the vectors for Coriollis because it is a rotational force) You are then left with a horizontal vector that balances the above vectors. Thus you have horizontal polarization. Why? *Because the vectors outside the boundary are a combination of two vectors which is gravity and the Coriolis. Now somebody mentioned the question of polarization purity ! When you include the Coriolis effect you get exactly that, a pure horizontal polarization which is very useful in determining whether forces in shear conditions exist at airports as *views *of reflection of transmissions *are confusing if you transfer a mixture in the first place. This way they have purity in radiation so that reflections are more clearer for their determinations as to what weather conditions exist and hopefully not "wind shear" where a plane instantly loses altitude. You are fortunate that you caught me before I left. ROTFLAMO |
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