All RF Cafe quizzes would make perfect fodder for employment interviews for technicians or engineers
- particularly those who are fresh out of school or are relatively new to the work world. Come to
think of it, they would make equally excellent study material for the same persons who are going to
be interviewed for a job.Some of these books used in quizzes
are available as prizes in the monthly
RF Cafe Giveaway
Note: Many answers contain passages quoted from the text.
This quiz is based on the information presented in
Antennas and Site Engineering for Mobile Radio Networks, by Bruno Delorme.
House graciously provided this book.
The book is divided into
three sections: the first section describes the functioning of all types of antennas used in mobile phone networks
and provides examples of each; the second part delves into the engineering of antenna sites, which is crucial to
the quality of mobile networks; the third part of the book includes refresher information on the mathematics and
physics necessary to understand the content of the book and put it to practical use in actual applications. The
book is packed with clear explanations and recommendations for avoiding problems and making the best antenna and
site decisions. Show more Show less
1. In Coulomb's Law, F =
m x m'
/ 4πεr2, what are
a) Two masses
b) Two magnetic domains
c) Two electric charges
d) Two general
2. With what phenomenon did James Clerk Maxwell compare
electromagnetic wave propagation?
a) A stone dropped into a pond
b) A flickering candle
c) A sonic boom
d) An ant's wanderings
3. What did Edouard
Branly use as the amplification element of his 'radio conductor' detection device?
c) Iron filings
d) Cat's whisker
What is the Poynting Vector? (Wikipedia page for
Poynting Vector animation)
a) A vector that points in the direction of the electric (E)
and magnetic (H) fields
b) A vector always
pointing in the direction of least RF resistance
c) The pathogen-transmitting organism that famously infected
physicist John Henry Poynting
d) The vectorial product of the electric (E)
and magnetic (H) fields at a given point
5. What is the defining feature of a panel antenna?
a) Is uses a
conductive panel behind the antenna array for providing directivity
b) It uses a panel of antennas
It is an antenna shaped like flat panel
d) It is an antenna shaped like parabolic panel
6. Which of the following factors affect the radiation pattern of an antenna mounted
on a pylon or mast?
a) Type of support (pylon or tubular mast)
b) Antenna distance from the
pylon or tubular mast
c) Cross-section of the pylon or tubular mast
d) All the above
7. In order to isolate co-located antennas with vertical polarization, which
of the two minimum separation distances are required.
a) λ/4 in the vertical and the horizontal
b) λ in the vertical and 3λ in the horizontal
c) 10λ in the vertical
d) 10λ in the
8. What are the main sources of noise from transmitter?
a) Harmonic distortion and oscillator phase noise
b) Noise in the modulating signal
Passive intermodulation (PIM)
d) Wind-induced Doppler from swaying antenna
What type of illumination must a parabolic reflector utilize for proper operation?
a) Left-hand circular
b) Right-hand circular polarization
c) Spherical wave
d) Trapezoidal wave
10. Which governing body is responsible for worldwide frequency coordination?
a) The Université de Intercontinental Teleportation (ITU)
b) The International Telephone Users
c) The Interdenominational Telecommunications Union (ITU)
d) The International Telecommunications
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Posted July 21, 2013