New answers tagged transmission-line
1
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Measuring the reflection coefficient \$\Gamma\$
What is measured, at the beginning, at the input (point A) is the "emission" coefficient Ke, and if the generator Impedance is 50 Ohm, then it would be
\$Ke=Zo/(Zo+50)=0.5\$.
Note that there ...
- 3,846
6
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Accepted
Measuring the reflection coefficient \$\Gamma\$
It's probably better to demonstrate this if I set up a microcap simulation circuit: -
I've modelled a lossless transmission line of impedance 50 Ω and length 25 metres. I've chosen this length so ...
- 379k
3
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Accepted
Modeling a transmission line
I'm not a PSpice user, but I believe I correctly duplicated your circuit in LTspice. The fact that you required the len parameter specified tells me that the RG58/...
- 2,084
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Will the reflection from the load end of a transmission line affect the behaviour of an ideal voltage source?
Will the reflected wave from the load end get again reflected from the
\$\color{red}{\text{ideal }}\$source end or does it get absorbed there so that the source can
provide the same voltage of Vsrc?
...
- 379k
2
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Will the reflection from the load end of a transmission line affect the behaviour of an ideal voltage source?
Normally we don't use ideal voltage sources and transmission lines together. Ideal voltage sources are an approximation from circuit theory, and (continuous) transmission lines are a step beyond ...
- 20.5k
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Will the reflection from the load end of a transmission line affect the behaviour of an ideal voltage source?
An ideal voltage source has 0 impedance. If a transmission line is terminated at one end with an ideal voltage source, it will reflect any incoming waves in the same manner as a short-circuit would ...
- 12.5k
2
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Why is electrical stress higher on the insulator string near the transmission conductor?
If you look at time dependent dielectric breakdown, time to breakdown is inversely related to electric field: time to breakdown decreases as the electric field increases. The exact function of that ...
- 271
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I need help understanding what the total Impedance in a delta connection is
There is a major difference between a parallel and a delta connection. In a delta connection, 3 impedances are connected to form a triangle. However, in a parallel connection, the resistances are ...
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6
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Modeling a transmission line
An ideal transmission line consists of two isolated ports, linked by a time delay. A real transmission line works similarly, but with a common mode impedance between ends; this is best simulated by ...
- 1,035
1
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Accepted
PCB Routing Considerations for multiple USB Port Types for USB 1.1 Full Speed
USB Full Speed is simply symmetrical* 12MHz LVCMOS logic levels. It's very far from a signal quality concern; fast enough to need proper cables, low enough voltage to need shielding, but at the PCB ...
- 1,035
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