Microwave Communication — Part 2 MCQs with Explanations

Its physical dimensions is the correct answer to “The resonant frequency of a cavity resonator depends upon”. This question is standard in competitive examination syllabi for Microwave Communication.

Delayed spreading is the correct answer to “In microwave transmission using digital radio, what causes most intersymbol interference”. This question is standard in competitive examination syllabi for Microwave Communication.

Is equivalent to an LC resonant circuit is the correct answer to “The cavity resonator”. This question is standard in competitive examination syllabi for Microwave Communication.

Circulator is the correct answer to “What ferrite device can be used instead of duplexer of isolate microwave transmitter and receiver when both are connected to the same antenna”. This question is standard in competitive examination syllabi for Microwave Communication.

At the cathode end of the helix is the correct answer to “At what position is the input signal inserted into a traveling-wave tube”. This question is standard in competitive examination syllabi for Microwave Communication.

To keep the electrons from spreading out is the correct answer to “What is the purpose of the electromagnetic field which surrounds a traveling-wave tube”. This question is standard in competitive examination syllabi for Microwave Communication.

Depends on the formation of charge domain is the correct answer to “The Gunn diode oscillator”. This question is standard in competitive examination syllabi for Microwave Communication.

A silicon crystal is the correct answer to “In a radar-set receiver, the usual mixer stage is”. This question is standard in competitive examination syllabi for Microwave Communication.

Sixth is the correct answer to “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.”. This question is standard in competitive examination syllabi for Microwave Communication.

The frequency will decrease is the correct answer to “A reflex klystron is oscillating at the frequency of its resonant cavity. If the reflector voltage is made slightly less negative, the”. This question is standard in competitive examination syllabi for Microwave Communication.

Tunnel diode is the correct answer to “Which one of the following is a negative differential resistance diode”. This question is standard in competitive examination syllabi for Microwave Communication.

Distortion-less is the correct answer to “A TEM mode transmission line is having distributed circuit parameters as R = 1 ohm/m, L = 200 nH/m, G = 300 µS/m, C = 60 pF, the line is:”. This question is standard in competitive examination syllabi for Microwave Communication.

Varactor diode is the correct answer to “The given equivalent circuit belongs to:”. This question is standard in competitive examination syllabi for Microwave Communication.

400 to 750 nm is the correct answer to “Wavelength of the visible light extends from”. This question is standard in competitive examination syllabi for Microwave Communication.

Klystron is the correct answer to “The microwave tube that uses buncher and catcher cavities is”. This question is standard in competitive examination syllabi for Microwave Communication.

Between the peak and valley voltages is the correct answer to “The negative resistance of the tunnel diode occurs when the bias voltage is”. This question is standard in competitive examination syllabi for Microwave Communication.

Ducting is the correct answer to “When microwave signals follow the curvature of the earth, this is known as-”. This question is standard in competitive examination syllabi for Microwave Communication.

Occurs near the accelerating grid is the correct answer to “In a reflex klystron, the velocity modulation”. This question is standard in competitive examination syllabi for Microwave Communication.

Magnetron is the correct answer to “Electric Field and Magnetic Field are perpendicular to each other in:”. This question is standard in competitive examination syllabi for Microwave Communication.

300 MHz to 3000 MHz is the correct answer to “What is range of UHF”. This question is standard in competitive examination syllabi for Microwave Communication.

All the three arms lie in magnetic field plane is the correct answer to “In an H-plane tee”. This question is standard in competitive examination syllabi for Microwave Communication.

the characteristic impedance of the guide becomes infinite is the correct answer to “Indicate the false statement- When the free-space wavelength of a signal equals the cut-off wavelength of the guide-”. This question is standard in competitive examination syllabi for Microwave Communication.

Electron transfer to the less mobile energy level is the correct answer to “In a Gunn diode, the negative resistance is due to”. This question is standard in competitive examination syllabi for Microwave Communication.

Magnetron is the correct answer to “Phase focusing, which leads to bunching of electrons takes place in which of the following”. This question is standard in competitive examination syllabi for Microwave Communication.

40 km is the correct answer to “In microwave telemetry, repeated station are required to cover large area. What is, generally, the distance between repeater stations”. This question is standard in competitive examination syllabi for Microwave Communication.

Ge is the correct answer to “Which of the following materials used in tunnel diode”. This question is standard in competitive examination syllabi for Microwave Communication.

it has a low turn on voltage is the correct answer to “Schottky diode has high switching speed because:”. This question is standard in competitive examination syllabi for Microwave Communication.

fp - fi is the correct answer to “The idler frequency of a non de-generate parametric amplifier with input frequency f i and pump frequency f p is”. This question is standard in competitive examination syllabi for Microwave Communication.

φ = 2π is the correct answer to “Most dominant mode in a traveling wave magnetron is the one in which”. This question is standard in competitive examination syllabi for Microwave Communication.

25 mW is the correct answer to “In a microwave measurement setup, the power roughing to the load is found to be 50 mW. If a 3 dB coupler is placed before the load, the power to the load will be”. This question is standard in competitive examination syllabi for Microwave Communication.

TEM wave is the correct answer to “In a parallel plate waveguide, what is the principal wave”. This question is standard in competitive examination syllabi for Microwave Communication.

prevent mode jumping is the correct answer to “In cavity magnetron, strapping is used to”. This question is standard in competitive examination syllabi for Microwave Communication.

2, 3 and 4 are correct is the correct answer to “Consider the following statements about the maximum usable frequency for radio communication between two specified points by reflection from an ionosphere layer: 1. It is equal to the critical frequency 2. It is more than the critical frequency 3. It depends upon the distance between the two points 4. It depends upon the height of the ionosphere layer Of these statements”. This question is standard in competitive examination syllabi for Microwave Communication.

30-300 MHz is the correct answer to “What is the frequency range of VHF electromagnetic waves”. This question is standard in competitive examination syllabi for Microwave Communication.

large power handling capacity is the correct answer to “Avalanche Photodiodes are preferred over PIN diodes in optical communication systems because of”. This question is standard in competitive examination syllabi for Microwave Communication.

TE21 is the correct answer to “The field configuration in two different view of waves propagating in a rectangular waveguide, as shown in the given figure represents the mode”. This question is standard in competitive examination syllabi for Microwave Communication.

Tunnel Diode is the correct answer to “Which of the following diode is very suitable for switching high frequency signals ON and OFF”. This question is standard in competitive examination syllabi for Microwave Communication.

Magnetron is the correct answer to “Which of the following is a cross-field device”. This question is standard in competitive examination syllabi for Microwave Communication.

Backward is the correct answer to “Performance of which one of the following diodes is not based on its negative resistance:”. This question is standard in competitive examination syllabi for Microwave Communication.

One H-plane tee and one E-plane tee is the correct answer to “Magic Tee is a combination of”. This question is standard in competitive examination syllabi for Microwave Communication.