What Do You Know About Antenna And Radio Wave Propagation? Quiz

15 Questions | By Srijitac | Last updated: Mar 17, 2022 | Total Attempts: 65

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What Do You Know About Antenna And Radio Wave Propagation? Quiz - Quiz

Questions and Answers

1.

What is the polarization of a discone antenna?
- A.
  
  Vertical
- B.
  
  Horizontal
- C.
  
  Circular
- D.
  
  Spiral
2.

If the antenna increases 3.3 times how much does the radiated power increase?
- A.
  
  3.3 times
- B.
  
  10.89 times
- C.
  
  9.9 times
- D.
  
  6.6 times
3.

When speaking of antennas. ______ is a section which would be a complete antenna by itself.
- A.
  
  Image
- B.
  
  Top loading
- C.
  
  Bay
- D.
  
  Quarterwave
4.

In what range of frequencies are most omnidirectional horizontally polarized antennas used?
- A.
  
  VHF, UHF
- B.
  
  VLF, LF
- C.
  
  SH, EHF
- D.
  
  MF, HF
5.

If the current ratios of the two or more elements must be held 5% and the phase angle to 3° the antenna is called a
- A.
  
  End fire array
- B.
  
  Critical phased array
- C.
  
  Broadband array
- D.
  
  Wideband array
6.

A device that converts high-frequency current into electromagnetic wave.
- A.
  
  Antenna
- B.
  
  Loudspeaker
- C.
  
  Microphone
- D.
  
  Transducer
7.

Which is a non-resonant antenna?
- A.
  
  Rhombic antenna
- B.
  
  Folded dipole
- C.
  
  End-fire array
- D.
  
  Yagi-Uda antenna
8.

Gain of a half-wave dipole antenna over isotropic.
- A.
  
  2.15 dB
- B.
  
  1.76 dB
- C.
  
  1 dB
- D.
  
  0dB
9.

Very low signal strength in antenna.
- A.
  
  Minor lobes
- B.
  
  Null
- C.
  
  Antenna patterns
- D.
  
  Major lobes
10.

What is the gain of the Hertzian dipole over isotropic antenna?
- A.
  
  1.64 dB
- B.
  
  2.15 dB
- C.
  
  1.76 dB
- D.
  
  1.55 dB
11.

______ is the measurement of unilateral antenna properties of directivity
- A.
  
  Phase angle
- B.
  
  Antenna gain
- C.
  
  Beamwidth
- D.
  
  Bandwidth
12.

In testing the transmitter to prevent interfering with other stations, which type of antenna must be used?
- A.
  
  Void antenna
- B.
  
  Dummy antenna
- C.
  
  Hertzian antenna
- D.
  
  Isotropic antenna
13.

The best solution to fading is _____.
- A.
  
  Space diversity
- B.
  
  Frequency diversity
- C.
  
  Polarization diversity
- D.
  
  Wavelength diversity
14.

_____ is the amount of uncertainty in a system of symbols.
- A.
  
  Bandwidth
- B.
  
  Enthalpy
- C.
  
  Entropy
- D.
  
  Quantum
15.

If an antenna has a gain of 3 dB, it increases the output of the transmitter by
- A.
  
  10,000 times
- B.
  
  1000 times
- C.
  
  100 times
- D.
  
  1 million times