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Owen Duffy wrote:
The fact is that the energy stored in a transmission line in the steady state is in the general case, a time variable, and you cannot state the energy (in joules) at a point in time knowing only forward and reflected power and the one way propagation time. The time-averaged energy stored in a transmission line doesn't vary with time (by definition) unless something changes. If the forward and reflected powers are based on fixed RMS values of voltage and current with fixed sources and loads, then certainly, time-averaged energy values can be calculated. That's the nature of *irradiance* in optics where instantaneous values are impossible to measure. The Power Flow Vector is analogous to irradiance. Is it all about semantics? Is the lack of a shared language the cause of difficulty understanding your concepts. No, the basic problem is that you keep accusing me of saying something I never said. I have never used the term "power wave" except in postings like this one. I have no idea what is the definition of "power wave". How it feels: It feels to me like you are one of a number of people willing to reject the basic principles of physics in order to mount an argument with me or anyone else who have been convinced by those laws of physics that reflected energy waves exist in reality - you know, the ones you actually see when looking in a mirror? -- 73, Cecil http://www.w5dxp.com |
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