EXAMIANS
At what position is the input signal inserted into a traveling-wave tube?
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What allow microwave to pass in only one direction?
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Which of the following operating frequencies is used for the modern loran navigational system?
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A reflex klystron is oscillating at the frequency of its resonant cavity. If the reflector voltage is made slightly less negative, the
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The highest frequency which a conventional vacuum tube oscillator can generate is not limited by the
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What do you call an attenuation that occurs over many different wavelengths of the carrier?
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Theoretically electromagnetic radiation field strength varies in inverse proportion to the square of the distance, but when atmospheric attenuation effects and the absorption of the terrain are taken into account the attenuation can be as high as the inverse ___________ power of the distance.
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The main frequency determining element of a klystron is
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Microwave frequencies are normally regarded as those in the range of
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It is possible to increase the maximum range of a radar equipment by
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