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The input impedance of an infinite line is equal to the characteristic impedance since the transmitted wave is never reflected back from the end. Equivalently: The characteristic impedance of a line is that impedance which, when terminating an arbitrary length of line at its output, produces an input impedance of equal value. This is so because ...
There are several approaches to understanding reflections, but the relationship of reflections to the conservation laws is particularly enlightening. A simple example is a step voltage, () (where is the height of the step and () is the unit step function with time ), applied to one end of a lossless line, and consider what happens when the line is terminated in various ways.
When the wave reaches the end of the transmission line, behaviour depends on what is present at the end of the line. There are three possible scenarios: The frequency of the pulse generated at the transducer results in a pressure peak at the terminus exit (odd ordered harmonic open pipe resonance) resulting in effectively low acoustic impedance ...
Key takeaways. An open-end mortgage provides financing to help you buy a home now and renovate it in the future. Open-end mortgages work similar to a home equity line of credit, but you can only ...
The free end of the stub is either left open-circuit, or short-circuited (as is always the case for waveguides). Neglecting transmission line losses, the input impedance of the stub is purely reactive ; either capacitive or inductive , depending on the electrical length of the stub, and on whether it is open or short circuit.
The terminator is usually placed at the end of a transmission line or daisy chain bus (such as in SCSI), and is designed to match the AC impedance of the cable and hence minimize signal reflections, and power losses. Less commonly, a terminator is also placed at the driving end of the wire or cable, if not already part of the signal-generating ...
Given that, however, the load is almost never a pure resistance. When the line is short, as seen from the driven end, the line does not modify the load impedance very much. If the load is an ordinary lagging load, the impedance seen at the driven end is a lagging load regardless of whether the power draw is less than or greater than the SIL.
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