12. Draw the field configuration of dominant mode in rectangular waveguide.
The dominant mode in rectangular waveguide is TE10 The field pattern is as shown below The radiation pattern of TE10 mode is as follows ...
Wednesday, 5 March 2014
11. what is waveguide cutoff frequency , guide wavelength , phase velocity , group velocity , propagation constant
Lets explain cutoff frequency , guide wavelength , group velocity , phase velocity and propagation constant of a waveguide. Cutoff frequency : Cutoff frequency is the frequency below which attenuation occurs and above which propagation takes place.Each mode have a specific cutoff frequency. For...
Thursday, 27 February 2014
10. What is rectangular waveguide
Rectangular waveguide is one of the types of waveguides.The shape of it is a hollow metallic tube with rectangular cross section as shown in the figure with dimension 'a' along x axis and dimension...
35. Explain about Ideal Low Pass Filter (ILPF) in frequency domain.
Lowpass Filter: The edges and other sharp transitions (such as noise) in the gray levels of an image contribute significantly to the high-frequency content of its Fourier transform. Hence blurring...
Tuesday, 25 February 2014
9. What is degenerate mode in waveguide.
In a waveguide when two or more modes have the same cut off frequency then they are said to be degenerate modes. In a rectangular waveguide the TEmn and TMmn with m ≠ 0 and n ≠ 0 are degenerate modes. For a square waveguide for which a = b, all the TEpq, TEqp, TMpq, TMqp modes are degenerat...
Sunday, 23 February 2014
8. what is dominant mode in waveguides
For a waveguide the dominant mode is the mode with the lowest cut off frequency. Single mode propagation reduce losses, so we use dominant mode propagation.The waveguide can be operated only in the dominant mode for a certain range of frequency, this range of frequency extend from cut off frequency...
7. what are modes in waveguides
Lets explain what are modes in waveguide mean.For every type of waveguide the electromagnetic waves inside the waveguide can have an infinite number of distinct electromagnetic field patterns or configurations, these distribution of electric and magnetic fields in a waveguide is called modes. The...
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