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- 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
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Note: Many answers contain passages quoted from the text.
quiz is based on the information presented in
Microstrip Lines and Slotlines, by Ramesh Garg, Inder Bahl, and Maurizio Bozzi.
House graciously provided this book.
Note: Some of these books are available as prizes in the monthly
RF Cafe Giveaway.
1. 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
d) 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
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 negligible
Which of the three drawings below represents the highest performance method of transitioning from coaxial connector
(a) (b) (c)
a) Straight inline transition
b) 90° transition
c) Tapered transition
perform the same
4. What is full-wave analysis?
analysis invoking quasi-static approximations
b) Field analysis not 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 frequency
5. What happens to the temperature
of microstrip as the frequency increases?
a) Thermoelectric dispersion causes cooling
currents in the metal cause heating
c) Dielectric heating causes a temperature rise
has no effect
6. What are examples of discontinuities
a) Open ends and gaps
b) Steps in width and right-angle bends
and cross junctions
d) All the above
7. Where does the wave propagate
in a slotline?
a) Along the slot
b) Perpendicular to the slot
c) Above the slot
d) Below the slot
8. What is a Defected Ground Surface (DGS)?
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
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
d) The waveguide section soldered to the substrate inline with the microstrip or stripline
10. What is the name given to a configuration whereby two transmission lines
are placed parallel to each other and in close proximity?
a) Coupled line
b) Isolated line
c) Guard band structure
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answers and explanations.