1996 - 2016
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 ...
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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.
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Note: Many answers contain passages quoted in whole or in part from the text.
Graciously provided by Artech House
1. Match the following frequency band ranges with their proper letter
|30 kHz - 300 MHz
300 MHz - 1 GHz
1 GHz - 2 GHz
2 GHz - 4 GHz
4 GHz - 8 GHz
8 GHz - 12 GHz
12 GHz - 18 GHz
18 GHz - 27 GHz
27 GHz - 40 GHz
40 GHz - 75 GHz
75 GHz - 110 GHz
|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.|
Need some help? Click here for the answers and explanations.