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David:
[snip] i'm sorry, but that just isn't true. make me an equivalent, with a distributed line, of a 1v step voltage source in series with a 1ohm resistor. [snip] A 1volt step voltage in series with a zero length transmission line terminated in a 1 Ohm resistor! Dave, all electrical systems, lumped and distributed alike, obey the Maxwell-Heaviside equations. They are all the same, not different as you claim! Prior to Maxwell [mid 1800's] folks believed that lumped and distributed systems might obey different laws, but ever since Maxwell wrote down his celebrated 22 equations, using quaternions, and Oliver Heaviside reduced them to 4 neat little vector differential equations back in the mid 1800's, most everyone, with the apparent exception of yourself, has accepted that lumped and distributed systems obey the same laws! What exactly is your point? Do you believe that lumped systems are described by different laws than distributed systems? Are you trying to convince me of that 150 year old discredited idea? All macro - electrical systems confirm to the same laws of electrodynamics, namely the Maxwell-Heaviside equations. The only systems where Maxwell-Heaviside fails to predict physical reality is when dealing with the "very" small, i.e. quantum mechanics when one has to do Engineering and make predictions and design one-photon-at-time. In this case you have to use quantum electrodynamics or QED but still all systems, lumped or distributed must obey QED and Maxwell-Heaviside is just a special case or approximation to QED laws in the aggregate when there are lots of photons. Dave you will have a lot of arguing to do to convince modern electro-technologists that lumped systems obey different laws from distributed systems. Or that the equations of lumped impedance matching are any different from transmission line impedance matching. They are the same! The models are the same, the mathematics are the same, the experiments confirm that they are the same. Exactly what is your point? -- Peter K1PO Indialantic By-the-Sea, FL. |