Microwave Communication What is the purpose of the electromagnetic field which surrounds a traveling-wave tube? To velocity modulate the electron beam To slow down the signal on the helix To accelerate the electron To keep the electrons from spreading out To velocity modulate the electron beam To slow down the signal on the helix To accelerate the electron To keep the electrons from spreading out ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication To achieve good bearing resolution when using a pulsed-radar set, an important requirement is A narrow, antenna-beam width in the vertical plane A high duty cycle A low repetition rate A narrow, antenna-beam width in the horizontal plane A narrow, antenna-beam width in the vertical plane A high duty cycle A low repetition rate A narrow, antenna-beam width in the horizontal plane ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication A traveling-wave tube (TWT) amplifies by virtue of The energy contained the cavity resonators The absorption of energy by the signal from an electron stream The effect of an external magnetic field The energy liberated form the collector The energy contained the cavity resonators The absorption of energy by the signal from an electron stream The effect of an external magnetic field The energy liberated form the collector ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication 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 A decrease in gain A decrease in range No noticeable effect A reduction in horizontal resolution A decrease in gain A decrease in range No noticeable effect A reduction in horizontal resolution ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication Which causes multipath or frequency selective fading? Nearer reflector Small reflector Large reflector Further reflector Nearer reflector Small reflector Large reflector Further reflector ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication Klystron oscillators are most often used in the frequency range of 300 to 3000 MHz 3000 to 30000 MHz 10 to 10000 MHz 30 to 30000 MHz 300 to 3000 MHz 3000 to 30000 MHz 10 to 10000 MHz 30 to 30000 MHz ANSWER DOWNLOAD EXAMIANS APP
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