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Reflected voltage pulses

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akipro

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Why are voltage pulses reflected back over long transmission lines or in circuits having high frequency? Does this follow basic principles of electronics( Kirchoff's law, etc. ) ?
 

The simplest answer:

At high frequencies the inductance and capacitance of a transmission line become very significant. The line acts like an infinite group of series parallel LC circuits
**broken link removed**

Kirchoff's laws still apply but the voltages are currents are now complex numbers because they are not in phase with each other:
http://www.tina.com/English/tina/course/221kirch/kirch
 
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