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what happens to reflected energy ?
Keith Dysart wrote:
Perhaps some examples will help. Consider the output terminals of a generator to be junction. Then the power delivered from the generator to the junction must exactly equal, at all times, the power taken from the junction by the load, since there is no storage in the junction. It should be noted that the 'junctions' used for a power analysis are not the same as the junctions used in Kirchoff's current law. The concepts are analogous, not identical. Another example. In the simple Thevenin generator, the power provided by the voltage source must exactly equal, at all times, the power taken by the resistor plus the power taken by the load. In this example, it is difficult (impossible?) to identify a physical 'junction' where the power must balance, yet the notion is still applicable. ...Keith It sounds like your "junction" for energy analysis is what's called a "port" in RF analysis. If so, it would be less confusing for you to use that term, since "junction" has a different established meaning in circuit analysis. Roy Lewallen, W7EL |
#2
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what happens to reflected energy ?
On Jul 8, 10:15*am, Roy Lewallen wrote:
Keith Dysart wrote: Perhaps some examples will help. Consider the output terminals of a generator to be junction. Then the power delivered from the generator to the junction must exactly equal, at all times, the power taken from the junction by the load, since there is no storage in the junction. It should be noted that the 'junctions' used for a power analysis are not the same as the junctions used in Kirchoff's current law. The concepts are analogous, not identical. Another example. In the simple Thevenin generator, the power provided by the voltage source must exactly equal, at all times, the power taken by the resistor plus the power taken by the load. In this example, it is difficult (impossible?) to identify a physical 'junction' where the power must balance, yet the notion is still applicable. ...Keith It sounds like your "junction" for energy analysis is what's called a "port" in RF analysis. If so, it would be less confusing for you to use that term, since "junction" has a different established meaning in circuit analysis. I prefer the term 'port' as well, but for this particular dialogue I was trying to emphasize the analogy between conservation of charge and conservation of energy by continuing with the same terminology. Unfortunately, it did not appear to help. From now on, 'port' it is. ....Keith |
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