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 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
Microwave 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.
What mnemonic is used to determine the direction of a magnetic field around a
a) The left-hand rule b) The right-hand rule c) The ambidextrous
rule d) Current-carrying wires do no generate magnetic fields
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
a) Resistance b) Conductance c) Convolution and de-convolution
d) Ratio of voltage to current amplitude and phase relationship
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 c) Impedance 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 b) 100% 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 short circuit
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 c) 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?
a) 0° b) 90° c) 180° d)
8. What is the phase relation of voltage and current in an ideal
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 related
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 or load
10. What are the three main stages
of amplifier design?
a) Biasing, stabilization, and impedance matching b) Input, transistor,
and output c) Preamplifier, small signal amplifier, and power amplifier d) None of the above