Es&t017
This QUIZ is made or by product of my continuous research & study about Electronics Engineering to help the Electronics Engineer/Technician Aspirants in passing the Board Examinations.
- 1.The real part of an antenna's input impedance is due to:
- A.
The radiated signal
- B.
The reflected signal
- C.
The SWR
- D.
All of the above
- 2.A half-wave dipole is sometimes called:
- A.
A Marconi antenna
- B.
A Hertz antenna
- C.
A Yagi antenna
- D.
None of the above
- 3.The end-to-end length of a half-wave dipole antenna is actually:
- A.
One wavelength
- B.
One half-wavelength
- C.
Slightly longer than a half-wavelength
- D.
Slightly shorter than a half-wavelength
- 4.The radiation of energy from an antenna can be seen in the:
- A.
Standing wave pattern around the antenna
- B.
SWR along the feed cable
- C.
Radiation resistance of the antenna
- D.
Power loss of the antenna
- 5.Measured on the ground, the field strength of a horizontally polarized half-wave dipole antenna is strongest:
- A.
In one direction
- B.
In two directions
- C.
In all directions
- D.
Depends on the number of elements
- 6.The ability of an antenna to radiate more energy in one direction than in other directions is called:
- A.
Directivity
- B.
Selectivity
- C.
Active antenna
- D.
Resonance
- 7.The front-to-back ratio of a half-wave dipole antenna is:
- A.
0 dB
- B.
3 dB
- C.
10 dB
- D.
Infinite
- 8.An antenna's beamwidth is measured:
- A.
From +90° to –90°
- B.
From front to back
- C.
Between half-power points
- D.
Between the minor side-lobes
- 9.ERP stands for:
- A.
Equivalent Radiation Pattern
- B.
Effective Radiation Pattern
- C.
Equivalent Radiated Power
- D.
Effective Radiated Power
- 10."Ground Effects" refers to the effects on an antenna's radiation pattern caused by:
- A.
Radio signals reflecting off the ground
- B.
Buildings and other structures on the ground
- C.
Fading
- D.
Faulty connection of the feed cable ground
Questions: 861 | Attempts: 35177 | Last updated: Jun 23, 2021
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