Reflection in a hollow metal waveguide

In summary, reflection in a hollow metal waveguide occurs when an electromagnetic wave hits a conducting surface and generates surface currents. These currents can radiate their own electromagnetic field, causing the incident field to be reflected. However, the angle of reflection may affect the efficiency and accuracy of the reflected wave.
  • #1
fisico30
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reflection in a hollow metal waveguide...

Hello Forum,

when an electromagnetic wave hits a conducting surface there are surface currents generated on the surface itself. These currents are the result of the interaction between the field and the metal. Do these currents radiate their own electromagnetic field? Is that how reflection occurs, i.e. these currents re-radiate a field after an incident field caused them?

thanks
fisico30
 
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  • #2


I have not worked in this area for many years, but the portion of the wave less than the angle of total reflection will travel down the tube with little loss. That portion of the wave striking the wall at a greater angle will fall into the reflected, transmitted or absorbed category. Some of the high angle energy will make it out of the tube, but will have traveled further than the efficient angles. This will result in some pulse distortion.
 

FAQ: Reflection in a hollow metal waveguide

1. What is reflection in a hollow metal waveguide?

Reflection in a hollow metal waveguide is the phenomenon in which electromagnetic waves, such as radio waves or microwaves, bounce off the walls of the waveguide instead of passing through it. This is due to the waveguide's structure and the properties of the metal used.

2. How does reflection in a hollow metal waveguide affect signal transmission?

Reflection in a hollow metal waveguide can cause interference and distortions in the transmitted signal, leading to a loss of signal quality. It can also result in signal leakage and loss of energy, reducing the overall efficiency of the waveguide.

3. What factors affect the amount of reflection in a hollow metal waveguide?

The amount of reflection in a hollow metal waveguide is affected by the material and thickness of the metal walls, the shape and size of the waveguide, and the frequency of the transmitted signal. Higher frequencies generally have a lower reflection coefficient than lower frequencies.

4. How can reflection in a hollow metal waveguide be minimized?

To minimize reflection in a hollow metal waveguide, the walls of the waveguide can be coated with a layer of material that absorbs or dampens the reflected waves. The shape and size of the waveguide can also be optimized to reduce reflections. Additionally, using a tapered waveguide can help reduce reflections by gradually changing the cross-sectional area of the waveguide.

5. What are some practical applications of reflection in a hollow metal waveguide?

Reflection in a hollow metal waveguide is commonly used in microwave and radio frequency transmission systems, such as in radar and satellite communication. It can also be utilized in waveguide filters and couplers for signal manipulation and distribution.

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