What are transmission line effects?
A1: The general concept is that when the transition time of the signal is “short” compared to the interconnect propagation delay, then a “long line,” or transmission line, effect exists, and transmission line treatment of the circuit must be used. …
What two conditions must be satisfied in order for total internal reflection?
The conditions required for total internal reflection (TIR) to occur are:
- the light must be travelling from a more dense medium into a less dense medium (ie glass to air)
- the angle of incidence must be greater than the critical angle.
How does reflection and transmission of light occur?
Reflection and transmission of light waves occur because the frequencies of the light waves do not match the natural frequencies of vibration of the objects. When light waves of these frequencies strike an object, the electrons in the atoms of the object begin vibrating.
What happens when there is mismatch of impedance between transmission line and load?
Whenever there is a mismatch of impedance between transmission line and load, reflections will occur. If the incident signal is a continuous AC waveform, these reflections will mix with more of the oncoming incident waveform to produce stationary waveforms called standing waves.
Where does the incident wave travel in a transmission line?
The incident wave is shown traveling from left to right, while the reflected wave travels from right to left: (Figure below) Incident wave reflects off end of unterminated transmission line. If we add the two waveforms together, we find that a third, stationary waveform is created along the line’s length: (Figure below)
What is the SWR of a perfectly terminated transmission line?
A perfectly terminated transmission line will have an SWR of 1, since voltage at any location along the line’s length will be the same, and likewise for current.