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Question about "Another look at reflections" article.
On Jun 10, 1:48*am, lu6etj wrote:
"There are no standing waves on a lumped element circuit component. (In fact, lumped-element circuit theory inherently employs the cosmological presupposition that the speed of light is infinite, as every EE sophomore should know. See, e.g., - Electric Circuits, by J.W. Nilsson, Addison-Wesley, 1983, p. 3.)" It probably should have said: "By a (possibly invalid) definition only, there are no standing waves on a lumped element circuit component, even though standing waves might exist in reality". Note that Dr. Corum is NOT saying that there are no standing waves. He is simply repeating the false assumptions of the lumped-element circuit model. In his other paper, he says that if a circuit is electrically longer than about 15 degrees and phase is important, the lumped- element circuit model should not be used. Any lumped-element circuit analysis can be caused to fail simply by increasing the source frequency. -- 73, Cecil, w5dxp.com |
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