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Jim Kelley wrote:
Yes, I'm very familiar with that article. You've already posted a link to it dozens of times on this newsgroup. It very clearly illustrates exactly those thing which I may have somewhat more 'colorfully' restated above, and more. It includes equations with variables for forward and reflected power all throughout, Yes, forward and reflected power measured at a *FIXED* measurement point. There is no "power flow" anywhere in my article. Energy does the flowing. Power is the measurement at a *FIXED* measurement point of that energy flow past that *FIXED* point. Did you note the use of the word, "FIXED"? Even though all my references, including the IEEE Dictionary allow for "power flow", I avoided it in my article as a favor to you. a reference to a supposed "4th mechanism of reflection" (that's the magical way in which waves of power and energy change direction), Yes, that may be somewhat original and therefore frightening for you. Galileo would have scared you to death. If, as Walter C. Johnson says, interference can *cause* standing waves, it can probably also cause reflections at an impedance discontinuity through wave cancellation. You are going to have to do more than wave your hands to prove otherwise. Not refusing to answer my questions about my examples would be a good start. Remember your absolute refusal to compute the total joules/sec after the first internal reflection arrived at the thin-film anti-reflective coating in my example? When you learn how to properly manage irradiance, get back to us. and illustrations with arrows named Pref showing how power is reflected at impedance discontinuities. No! No! No! Power is NOT reflected at an impedance discontinuity. Those are Poynting vectors. Energy is reflected and that reflected energy is measured and called "reflected power". Reflected power is not moving. You continue to get it wrong. The reflected power is acutally reflected energy measured flowing past a *FIXED* point near the impedance discontinuity. There are joules in the reflected wave. The joules in the reflected wave are measured flowing past a *FIXED* measurement point. But, of course, I have explained all of this to you before yet you continue bear false witness after all these years. Back when our corresponence was more cordial, I advised you not to write those things. And now you'd like to deny having done it; all the while portraying me as a liar. You're beautiful, man. I changed my article just to make you happy. You obviously have misunderstood, either through lack of processing power, ignorance, or deliberately. I would guess it is deliberate. -- 73, Cecil http://www.w5dxp.com |
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