All RF Cafe Quizzes make great 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. Bonne chance, Viel Glück, がんばろう,
buena suerte, удачи, in bocca al lupo, 행운을 빕니다,
ádh mór, בהצלחה, lykke til, 祝你好運.
Well, you know what I mean: Good luck!
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RF Cafe Quizzes.
Note: Some material based on books have quoted passages.
This quiz is based on the information presented
Introduction to Antenna Analysis Using EM Simulation, by Hiroaki Kogure,
Yoshie Kogure, and James C. Rautio, published by Artech House. It is written for
novice engineers and engineering students. This easy-to-comprehend resource offers
readers thorough introductory-level treatment of antenna analysis using electromagnetic
(EM) simulators. This richly-illustrated book shows how to use EM software to analyze
and tune wireless antennas to meet specific requirements. Readers learn important
wireless antenna design terminology and gain a detailed understanding of how antennas
work. Moreover, the book offers guidance in troubleshooting problems with wireless
Note: Sonnet Lite is a free download provided by the Sonnet company,
of Syracuse, NY.
1. What was the James C. Ratio's first antenna design
2. Just exactly what is an antenna?
a) Any metal structure
b) Any non-metallic structure
Any structure that performs the function of transmitting and receiving electromagnetic
d) The little feely thing on the bugs' heads
3. Where is the approximate location
of the near field / far field transition?
a) λ/10 from the antenna
b) λ/2 from the antenna
from the antenna
d) 2λ from the antenna
4. What does a time-varying magnetic field generate?
a) An electric field
b) An orthogonal magnetic field
An amplitude modulated gravity wave
d) Cancellation of all fields
5. What is the impedance of a minimum-loss coaxial cable
with an air dielectric?
a) 25 Ω
b) 50 Ω
c) 75 Ω
d) 100 Ω
6. How is dielectric material modeled in an EM simulator?
a) Series RC
b) Parallel RC
c) Series RL
7. What happens to magnetic flux if current through the
loop is doubled?
a) It also doubles
b) It increases as the square of the current
c) It increases as the square root of the current
d) It increases
as the 4th power of the current
8. For an input power of 1 W, what is the output power
of a lossless passive antenna with a specified gain of 3 dB or 6 dB?
a) 1/2 W and 1 W, respectively
b) 1 W for both gains
2 W and 4 W, respectively
d) 3 W and 6 W, respectively
9. Where does a log-periodic antenna get its name?
a) The shape resembles a log with straight branches
b) It is the
dual of the linear antenna
c) From logarithmic diameter ratios of the radiating
d) From the logarithmic spacing and length of its dipoles
10. Proper test environments are crucial to reliable EM
field measurements as evidenced by what factor in Heinrich Hertz's early experiments?
a) Nearby AC lighting
b) Metal buttons on his jacket
Wet wooden roof from a rain storm
d) A nearby pot bellied stove
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the answers and explanations.