RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling
2 MB. Its primary purpose was to provide me with ready access to commonly needed
formulas and reference material while performing my work as an RF system and circuit
design engineer. The World Wide Web (Internet) was largely an unknown entity at
the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps
while typing up your telephone line, and a nice lady's voice announced "You've Got
Mail" when a new message arrived...
All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowledged.
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!
This material, which includes a full-color textbook and over 12 hours of video
tutorials (in mp4 format on enclosed DVD-R), provides a comprehensive guide for
the RF and Microwave engineering student or junior professional. It allows the reader
to achieve a good understanding of the foundation theory and concepts behind high
frequency circuits as well illustrating the most common design and simulation techniques
for passive and active RF circuits. A preview of the textbook, a comprehensive description
of the content of the video tutorials and sample video tutorials are available on
the Explore RF website -
Note: Dr. Fornetti personally provided
the copy of Conquer Radio Frequency that was used to create this quiz,
and has authorized me to include it in the monthly
Book Drawing. His
video to the right provides a great introduction to the book and to the very well-done
set of instructional videos featured on the included DVD. AWR's
Office (MWO) software is used throughout the tutorials. A live, narrated, step-by-step
process is fully captured on-screen so you see how to create the circuit schematic,
set up the component parameters for simulation and optimization, specify graph and
table types, how to designate input files, configure input stimulus, and how to
interpret the results of the simulation. It is an excellent way to familiarize yourself
with where to find everything in MWO's menu and toolbar structure - which can be
a daunting task with any sophisticated software. The book itself is chock full of
very understandable instruction beginning with AC/RF fundamentals and progressing
through impedance matching, transmission lines, Q factors, amplifier design, and
much more. The illustrations are excellent.
1. What mnemonic is used to
determine the direction of a magnetic field around
a current-carrying wire?
a) The left-hand rule
b) The right-hand rule
c) The ambidextrous
d) Current-carrying wires do no generate magnetic fields
2. What is conventional current flow?
a) Current flowing from positive to negative
b) Current flowing
from negative to positive
c) Power flowing from positive to negative
d) Power flowing from negative to positive
3. What quantity (or quantities) does complex impedance
c) Convolution and de-convolution
d) Ratio of voltage to current amplitude and phase relationship
4. What happens to the characteristic impedance of a coaxial
transmission line when the dielectric constant
of the space between the inner and outer conductor is increased?
a) Impedance decreases
b) Impedance increases
is independent of the dielectric constant
d) Impedance does not exist in
a coaxial transmission line
5. What portion of an incident signal is reflected by
an open-circuit load and a short-circuit load, respectively?
a) 0% by the open circuit and 0% by the short circuit
by the open circuit and 0% by the short circuit
c) 0% by the open circuit
and 100% by the short circuit
d) 100% by the open circuit and 100% by the
6. How does the source "see" a 1/4-wavelength transmission
line that is terminated in a short circuit?
a) As a properly terminated load
b) As a short circuit
As an open circuit
d) As a complex load
7. How many degrees of phase change is represented by
moving an impedance point all
the way around a constant
impedance or constant admittance circle of a Smith Chart?
8. What is the phase relation of voltage and current in
an ideal inductor?
a) Current leads voltage by 90°
b) Voltage leads current by 90°
c) Voltage and current are in phase
d) Voltage and current are not
9. What is the meaning of unconditional stability for
an amplifier circuit?
a) The amplifier will oscillate under all conditions
b) The amplifier
will only oscillate under extreme conditions
c) The amplifier will only
oscillate with both source and load at the characteristics circuit impedance
d) The amplifier is not capable of oscillation at any phase of the source
10. What are the three main stages of amplifier design?
a) Biasing, stabilization, and impedance matching
b) Input, transistor,
c) Preamplifier, small signal amplifier, and power amplifier