# Microwave and Millimeter-Wave Electronic PackagingRF Cafe Quiz #58

All RF Cafe quizzes would make perfect fodder in 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 Quizzes.
Note: Some material based on books have quoted passages.

This quiz is based on the information presented in Microwave and Millimeter-Wave Electronic Packaging, by Rick Sturdivant.

Graciously provided by Artech House

1.  Match the following frequency band ranges with their proper letter designations.

 Letter Frequency Range CKKaKuLSUHFVVHFWX 30 kHz - 300 MHz300 MHz - 1 GHz1 GHz - 2 GHz2 GHz - 4 GHz4 GHz - 8 GHz 8 GHz - 12 GHz12 GHz - 18 GHz18 GHz - 27 GHz27 GHz - 40 GHz40 GHz - 75 GHz 75 GHz - 110 GHz

2.  What is the main additional issue concerning high versus low frequency design?

a)  Resonances
b)  Distributed reactance
c)  Cross-coupling
d)  All the above

3.  What is the difference between loss tangent and dissipation factor?

a)  Loss tangent has no resistance value
b)  Dissipation factor does not account for permittivity being complex at high frequencies
c)  Loss tangent includes resistance
d)  There is no difference between the two

4.  What is a first-level interconnect in reference to RFIC design?

a)  Electrical connection between the semiconductor device and the package
b)  Electrical connection between the first and second level semiconductor metallization
c)  Electrical connection from the bottom metallization of the semiconductor to the heatsink
d)  Mechanical connection from the bottom metallization of the semiconductor to the heatsink

5.  Match the following terms with their proper definitions.

 Term Definition Atomic polarization Occurs when molecules with ionic bonds have a displacement of the positive ions relative to negative ions in the presence of an electric field. Ionic polarization Occurs when the center of an electron cloud of an atom is displaced relative to the center of the nucleus in the presence of an electric field. Orientation polarization Occurs when molecules that have a permanent dipole moment, but are naturally randomly oriented, orient themselves in the presence of an electric field.

6.  What makes metals good electrical conductors?

a)  Bound electrons
b)  Free electrons
c)  Reciprocal mho effect
d)  Free protons

7.  What are properties of ceramics that make them good as microwave circuitry substrates?

a)  Inherently stable due to high Young's modulus
b)  Low insertion loss for types like alumina and quartz
c)  Tight line resolutions for impedance control
d)  a & b
e)  a & c
f)  b & c
g)  All the above

8.  What type of thick film pastes are available for use on ceramic substrates?

a)  Metals
b)  Resistive
c)  Insulative
d)  a & b
e)  a & c
f)  b & c
g)  All the above

9.  What are the names of the two ends of the depicted
type of wire bond?

a)  Sphere and plane
b)  Circle and line
c)  Ball and wedge
d)  Ball and stitch

10.  What is one of the main advantages of flip chip mounting for high frequency ICs?

a)  Larger die possible
b)  Lower cost
c)  Lower wire bond inductance
d)  Higher reliability

Need some help? Click here for the answers and explanations.

 About RF Cafe Copyright: 1996 - 2024Webmaster:    Kirt Blattenberger,    BSEE - KB3UON 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 Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ... All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged. My Hobby Website:  AirplanesAndRockets.com