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.
Click here for the complete list of RF Cafe
Note: Many answers contain passages quoted in whole or in part from the text.
quiz is based on the information presented in
Microstrip Lines and Slotlines, by Ramesh Garg, Inder Bahl, and Maurizio Bozzi.
Graciously provided by
What is a principal requirement for a transmission structure to be suitable
as a circuit element in a microwave integrated circuit (MIC)?
a) It needs to be rectangular
b) It must be copper plated
c) It is usually much wider than it is long
It should be planar in configuration.2.
What are two
consequences of the non-TEM behavior of microstrip lines?
a) Effective dielectric
constant and impedance are functions of frequency
b) A lower cutoff frequency is established,
like with waveguide
c) An upper frequency is established due to the critical angle
d) Their combined effects are negligible3.
of the three drawings below represents the highest performance method of transitioning from coaxial
connector to microstrip?
a) Straight inline transition
b) 90° transition
c) Tapered transition
d) All perform the same4.
What is full-wave analysis?
a) Field analysis invoking quasi-static approximations
b) Field analysis
invoking quasi-static approximations
c) Field analysis that include a full
wavelength of the lowest frequency
d) Field analysis that include a full wavelength of
the highest frequency5.
What happens to the temperature
of microstrip as the frequency increases?
a) Thermoelectric dispersion causes cooling
b) Eddy currents in the metal cause heating
c) Dielectric heating causes a temperature
d) Frequency has no effect6.
examples of discontinuities in microstrip?
a) Open ends and gaps
in width and right-angle bends
c) T and cross junctions
d) All the above
Where does the wave propagate in a slotline?
a) Along the slot
b) Perpendicular to the slot
c) Above the slot
Below the slot8.
What is a Defected Ground Surface
a) An artifact of imperfect substrate fabrication
b) A discontinuity
caused by thermal stress
c) An intentional deviation from a continuous flat ground plane.
d) A ground plane that goes over to "the other side"9.
What is the distinguishing feature of a coplanar waveguide?
a) All elements are collocated
in the substrate stack
b) All elements are collocated on the same surface of the substrate
c) The waveguide is formed by etching a 3-dimensional channel in the substrate
The waveguide section soldered to the substrate inline with the microstrip or stripline
What is the name given to a configuration whereby two
transmission lines are placed parallel to each other and in close proximity?
b) Isolated line
c) Guard band structure
Need some help? Click here for the
answers and explanations.