Checking Speed of EM Waves in Coaxial Lines with Pulse Function

In summary, the pulse function is more suitable for checking the speed of electromagnetic waves in coaxial lines because it allows for easier comparison of edges compared to other functions with slanted edges. This is due to the fact that the edges of pulse functions occur at an exact instant in time, making it easier to determine the speed without having to account for dispersion.
  • #1
newton1
152
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why we should use the pulse function in function generator when we need to check the speed of electromagnetic wave in coaxial line ??
why we can't use the other like sawtooth function??
 
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  • #2
It is easier to compare the edges of pulse functions than to compare slanted edges. Assuming an ideal pulse, and no dispersion, the edges of the pulses will occur entirely at an exact instant in time. Using a signal with slanted edges, you would have to determine what part of the edge of the transmitted signal to compare to what part of the edge of the received signal.
 

1. How is the speed of EM waves measured in coaxial lines with pulse function?

The speed of EM waves in coaxial lines with pulse function is measured by calculating the time it takes for the pulse to travel through the line. This is done by measuring the time difference between when the pulse is sent and when it is received at the other end of the line.

2. What is the purpose of measuring the speed of EM waves in coaxial lines with pulse function?

Measuring the speed of EM waves in coaxial lines with pulse function allows for the characterization and optimization of the line for efficient transmission of signals. It also helps to identify any potential issues or defects in the line that may affect its performance.

3. How does the pulse function work in measuring the speed of EM waves in coaxial lines?

The pulse function sends a brief burst of electromagnetic energy through the coaxial line, which travels at the speed of light. By measuring the time it takes for the pulse to travel through the line, the speed of the EM waves can be calculated.

4. What factors can affect the speed of EM waves in coaxial lines with pulse function?

The speed of EM waves in coaxial lines with pulse function can be affected by the type and quality of the coaxial cable, the length of the line, and any interference or obstructions in the line. Temperature and humidity can also have a minor impact on the speed of the waves.

5. Are there any limitations to measuring the speed of EM waves in coaxial lines with pulse function?

While measuring the speed of EM waves in coaxial lines with pulse function is an accurate method, it may not take into account all factors that can affect the speed. Additionally, the accuracy of the measurement may be affected by the precision of the equipment used and external environmental conditions.

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