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Cecil wrote,
Ever measure the forward and reflected currents halfway into a shorted 1/4WL stub? How can currents be flowing unimpeded into and out of an infinite impedance? In the case of a lossless, 1/4WL stub, (no such thing, except on this newsgroup) in the steady state you can disconnect the transmitter and the currents will still be there. Current doesn't flow, Cecil, charge flows. Current is just the rate of flow of charge, dQ/dt. In a 1/4WL stub, charge, and the fields associated with it, are in a state of oscillation. Over time, their average movement in space is zero. It's too bad you have to think of current as like the water in a big river that has to flow from one place to another in order to exist. (That's wrong, too. Current in a river is the rate of flow of water past a point, not the water itself.) Sloppy semantics sure screw up understanding. 73, Tom Donaly, KA6RUH |
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