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John Popelish wrote:
He seems to confuse energy in the wave traveling along a conductor with the current it induces along that conductor, as it travels. It's not confusion, John. It is engineering convention. Every engineering reference book I have refers to current flow at one point or another. Most of them also refer to power flow. "Transmission Lines and Networks", by Walter C. Johnson even refers to "The Conservation of Power Principle". Since there is no such thing as an RF battery, we know exactly what Mr. Johnson meant. You are discussing the conventions used by physicists. Since this is basically an RF engineering convention newsgroup, you need to adjust your concepts accordingly or tell everyone that you are nit-picking based on the conventions from the field of pure physics. In the engineering world: Power companies generate power and transfer the power to the consumers over transmission lines. RF transmitters generate power which is transferred over the transmission line and radiated by the antenna. There is always a convention for placing an arrow on a wire to indicate direction of current flow, whether RMS AC or DC or RMS RF. The AC conventions are left over from the DC conventions. If you are trying to change those conventions, please say so. Food for thought: If an electron can pass through two different holes at the same time, can it also travel in two directions at the same time? Quantum physics says that is a possibility. Is that because the result is not a pure standing wave (superposition of two equal and oppositely traveling waves), but a superposition of a pair of traveling oppositely traveling waves of different amplitudes? Yes, but the definition of a standing wave is that the two waves are of equal amplitudes. The wave you are describing is a hybrid wave containing both a traveling wave and a standing wave. Any real-world system contains hybrid waves in various ratios of traveling waves to standing waves. -- 73, Cecil http://www.qsl.net/w5dxp |
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