RF Cafe Software

RF Cascade Workbook 2005 - RF Cafe
RF Cascade Workbook

Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel
RF & EE Symbols Word
RF Stencils for Visio

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2016
Webmaster:
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

Try Using SEARCH
to Find What You Need. 
There are 1,000s of Pages Indexed on RF Cafe !

Electronics World Cover,TOC,and list of posted Popular Electronics articles QST Radio & TV News Radio-Craft Radio-Electronics Short Wave Craft Wireless World About RF Cafe RF Cafe Homepage RF Cafe in Morse Code Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes AN/MPN-14 Radar 5CCG Notable Quotes App Notes Calculators Education Magazines Software,T-Shirts,Coffee Mugs Articles - submitted by RF Cafe visitors Simulators Technical Writings RF Cafe Archives Test Notes RF Cascade Workbook RF Stencils for Visio Shapes for Word Thank you for visiting RF Cafe!

Antennas
RF Cafe Quiz #16

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 Quizzes.

Note: Many answers contain passages quoted in whole or in part from the text.




1. What does dBi, the most often used unit for antenna gain (or directivity), stand for?

a) Decibels of isolation
b) Isometric radiation in decibels
c) Decibels of gain relative to an isotropic radiator
d) Intrinsic gain in decibels



2. For which region of space does antenna gain normally apply?

a) Near field
b) Far field
c) At the feed point
d) Everywhere



antenna coordinates and radiation pattern  antenna coordinates and radiation pattern
  Elevation Pattern         Azimuth Pattern
3. For which type of antenna does the pattern to the right describe?

a) Parabolic
b) Yagi
c) 1/2-wave dipole
d) 1/4-wave vertical whip



4. What is the free space impedance that an antenna "sees?"

a) 50 Ω
b) 75 Ω
c) 16p Ω (≈50 Ω)
d) 120p Ω (≈377 Ω)



5. What is the name given to the point where the RF input signal interfaces to the antenna?

a) ICP (input connection point)
b) Feed-point
c) BNC connector
d) N connector



6. Where is the approximate transition point between near field and far field?

a) λ / (2p)
b) λ
c) 5λ
d) 10λ



7. What is an isotropic radiator?

a) An antenna that radiates equally in all directions
b) An antenna with equal dimensions
c) An antenna designed to broadcast in the troposphere
d) None of the above



8. Which type of antenna would typically have the highest directivity?

a) 1/4-wave whip
b) Folded dipole
c) Yagi
d) Parabolic



9. On a center-fed 1/2-wave dipole, where is the voltage potential the highest?

a) In the center
b) At the tips
c) Equal everywhere
d) Nowhere - dipoles operate on current



10. Yagi antennas are constructed of which three types of elements?

a) Transmitter, receiver, and transceiver
b) Underdriven, driven, and overdriven
c) Reflector, driven, and director
d) Aluminum, iron, and magnesium



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