What do you call an attenuation that occurs over many different wavelengths of the carrier?
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ECE · all questionsMicrowave Communication
Microwave Communication
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Microwave frequencies are normally regarded as those in the range of
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Which of the following is used as an oscillator device in the SHF band?
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Which of the following is used as a high power microwave oscillator?
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__________ is the progressive decrease of signal strength with increasing distance.
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A magnetron is operated at a duty cycle of 0.001. It has a peak power output of 100 kilo-watts. Its average power is
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If the duration of the radar transmitted pulse, on a particular range of operation, is increased, the required bandwidth of the receiver’s IF amplifiers
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The frequency of the oscillation generated by a magnetron, is mainly determined by
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When used in conjunction with a radar set, the purpose of an echo box is to provide an artificial target.
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The coarse frequency adjustment of a reflex klystron is accomplished by
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Which of the following operating frequencies is used for the modern loran navigational system?
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The maximum usable range of the usual radar set (on any particular range setting) is determined by
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A Class-S Emergency Position-Indicating Radio Beacon (E.P.I.R.B)
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A thin layer of dirt and grime coverts the reflecting surface of the parabolic dish of a radar set. The particular effect on the performance of the radar will be
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Which of the reception problems below that is not due to multipath?
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A traveling-wave tube (TWT) amplifies by virtue of
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Calculate the effective earth’s radius if the surface refractivity is 301.
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In an SHF pulsed radar set, a reflex klystron can be used as a
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To achieve good bearing resolution when using a pulsed-radar set, an important requirement is
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The highest frequency which a conventional vacuum tube oscillator can generate is not limited by the
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