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 Waveguides 34 Flashcards |
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Which type of wave cannot exist inside a waveguide? |
Card: 1 / 34 |
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Transverse Electromagnetic (TEM) wave |
Card: 2 / 34 |
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Fill in the blank: The dominant mode in a waveguide is the mode having the lowest ______. |
Card: 3 / 34 |
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Cut-off frequency |
Card: 4 / 34 |
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True or False: Rectangular waveguides allow both TE and TM modes to exist. |
Card: 5 / 34 |
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True |
Card: 6 / 34 |
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Riddle: I guide waves through reflections, but I am hollow inside. What am I? |
Card: 7 / 34 |
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A waveguide |
Card: 8 / 34 |
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What is the characteristic impedance of free space? |
Card: 9 / 34 |
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377 Ω |
Card: 10 / 34 |
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Which equation represents the propagation constant in a waveguide? |
Card: 11 / 34 |
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Γ = α + iβ |
Card: 12 / 34 |
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Fill in the blank: In a circular waveguide, the TE modes are characterized by ______. |
Card: 13 / 34 |
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Ez = 0 |
Card: 14 / 34 |
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True or False: The TM mode in a waveguide can exist if Hz = 0. |
Card: 15 / 34 |
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False. For TM mode, Ez must exist to transmit energy. |
Card: 16 / 34 |
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What happens to wave propagation when the frequency is below the cut-off frequency? |
Card: 17 / 34 |
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There is total wave attenuation. |
Card: 18 / 34 |
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Which mode is dominant in rectangular waveguides? |
Card: 19 / 34 |
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TE10 mode |
Card: 20 / 34 |
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Fill in the blank: The guide wavelength is the distance travelled by a wave to undergo a phase shift of ______. |
Card: 21 / 34 |
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2π radians |
Card: 22 / 34 |
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True or False: TEM modes can exist in circular waveguides. |
Card: 23 / 34 |
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False. TEM modes cannot exist in circular waveguides. |
Card: 24 / 34 |
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Riddle: I am a number that defines when a mode can no longer propagate, but I am not a frequency. What am I? |
Card: 25 / 34 |
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Cut-off wave number |
Card: 26 / 34 |
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What is the relationship between phase velocity and group velocity in free space? |
Card: 27 / 34 |
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Vp = vg |
Card: 28 / 34 |
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Fill in the blank: The attenuation constant is represented by ______. |
Card: 29 / 34 |
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Α |
Card: 30 / 34 |
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Which equation describes the power transmission for TM modes in a waveguide? |
Card: 31 / 34 |
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P = (1/2) * η * |E|² |
Card: 32 / 34 |
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Which of the following modes cannot exist within a waveguide? A) TE mode B) TM mode C) TEM mode D) All of the above |
Card: 33 / 34 |
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C) TEM mode |
Card: 34 / 34 |
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