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How to consider a line as Transmission Line

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Ershadh

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How to consider a line as a transmission line? If it is is based on the frequencies we use; then is the connections inside the CPU of a computer can be considered as one?
 

All conductors are transmission lines. When they are very short compared to a wavelength or compared to a pulse rise time they can be accurately approximated as an ordinary connection without considering the reflections and impedance transformation effects.
 
A rule of thumb demands to consider transmission line properties of a connection if the electrical length is larger than 1/10 of wavelength.
 
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