Search RFCafe.com                           
      More Than 18,000 Unique Pages
Please support me by ADVERTISING!
Serving a Pleasant Blend of Yesterday, Today, and Tomorrow™ Please Support My Advertisers!
   Formulas & Data
Electronics | RF
Mathematics
Mechanics | Physics
     AI-Generated
     Technical Data
Pioneers | Society
Companies | Parts
Principles | Assns


 About | Sitemap
Homepage Archive
        Resources
Articles, Forums Calculators, Radar
Magazines, Museum
Radio Service Data
Software, Videos
     Entertainment
Crosswords, Humor Cogitations, Podcast
Quotes, Quizzes
   Parts & Services
1000s of Listings
 Vintage Magazines
Electronics World
Popular Electronics
Radio & TV News
QST | Pop Science
Popular Mechanics
Radio-Craft
Radio-Electronics
Short Wave Craft
Electronics | OFA
Saturday Eve Post

Software: RF Cascade Workbook
RF Stencils for Visio | RF Symbols for Visio
RF Symbols for Office | Cafe Press
Espresso Engineering Workbook

Aegis Power  |  Alliance Test
Centric RF  |  Empower RF
ISOTEC  |  Reactel  |  RFCT
San Fran Circuits

LadyBug RF Power Sensors

Rigol DHO1000 Oscilloscope - RF Cafe

Please Support RF Cafe by purchasing my  ridiculously low-priced products, all of which I created.

RF Cascade Workbook for Excel

RF & Electronics Symbols for Visio

RF & Electronics Symbols for Office

RF & Electronics Stencils for Visio

RF Workbench

T-Shirts, Mugs, Cups, Ball Caps, Mouse Pads

These Are Available for Free

Espresso Engineering Workbook™

Smith Chart™ for Excel

Innovative Power Products (IPP) 90 deg Hybrid Couplers

Stimson's Introduction to Airborne Radar
RF Cafe Quiz #62

RF Engineering Quizzes - RF CafeAll RF Cafe Quizzes make great 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. Bonne chance, Viel Glück, がんばろう, buena suerte, удачи, in bocca al lupo, 행운을 빕니다, ádh mór, בהצלחה, lykke til, 祝你好運. Well, you know what I mean: Good luck!

Click here for the complete list of RF Cafe Quizzes.

Note: Some material based on books have quoted passages.

Stimson's Introduction to Airborne Radar - RF CafeThis quiz is based on the information presented in Stimson's Introduction to Airborne Radar, Third Edition, by Hugh D. Griffiths, Christopher Baker, and David Adamy.

The publisher was not kidding when he stated, "recognizing that people who have an interest in airborne radars love airplanes, dispersed through the book are photos and renderings of radar-bearing aircraft from all over the world." If for no other reason, Stimson's book is a good one to leave on your desk or coffee table as a way-cool picture book for your friends to peruse while visiting. Introduction to Airborne Radar is in every sense a text designed to turn the electronics neophyte who has a reasonable grasp of algebra and physics into a technician who possesses a working knowledge of airborne radar (and radar in general) transmitter, receiver, antenna, and processor systems. The authors teach from first principles about antenna radiation, the decibel, frequency conversion, filtering, signal processing, target acquisition and tracking, spread spectrum, Doppler shift, radar cross section, electronic countermeasures, Skolnik Radar Handbook - RF Cafeclutter cancelling, platform configurations, and much more. This book is not like the equally vaunted Skolnik Radar Handbook that is chock full of equations and theoretical discussions, known to make otherwise competent technophiles curl into a prenatal position while rocking back and forth. It is impossible for a reader to study this entire book and not be able to participate in an intelligent conversation on radar systems from both a technical standpoint and a historical perspective. Can you tell I'm impressed?

Note: Some of these books are available as prizes in the monthly RF Cafe Giveaway; however, this one will likely remain in my possession for a long time..

 

1.  What is another, more common name for a coherent radar system?

a)  Linear frequency radar

b)  Linear phase radar

c)  Pulse Doppler radar

d) Constant amplitude radar

 

 

 

2.  Match the following common radar frequency bands with their central frequencies.

a)  C

b)  Ka

c)  Ku

d)  S

e)  X

3 GHz

6 GHz

10 GHz

15 GHz

38 GHz

 

 

 

3.  In which direction(s) does(do) an antenna's sidelobe(s) exist?

a)  Front only

b)  Side only

c)  Back only

d)  All directions

 

 

 

4.  What causes a grating lobe in an electronically scanned antenna?

a)  Spacing radiating elements at too great of a distance

b)  Spacing radiating elements at too small of a distance

c)  Too low radiated power

d)  Too high radiated power

 

 

 

5.  What is the main advantage of a pulsed radar over a non-pulsed radar?

a)  Pulsed radar avoids transmitter leakage issues

b)  Pulsed radar allows higher power

c)  Pulsed radar is less expensive that non-pulsed radar

d)  Pulsed radar can be used on airborne platforms whereas non-pulsed cannot

 

 

 

6.  What is radar cross-section (RCS)?

a)  Physical size of the radar unit

b)  Physical size of the radar antenna

c)  Effective size of the radar unit and antenna relative to a perfect radar system

d)  Effective area of the signal reflecting surface relative to a perfectly reflecting sphere of the same projected area

 

 

 

7.  What is "chirping?"

a)  Linear amplitude modulation over the transmit time

b)  Linear frequency modulation over the transmit time

c)  Transmitting one under PAR

d)  Radar return of a flock of birds

 

 

 

8.  Coherence in radar refers to which of the following?

a)  Time of the signal from one pulse to the next

b)  Frequency of the signal from one pulse to the next

c)  Amplitude of the signal from one pulse to the next

d)  Phase of the signal from one pulse to the next

 

 

 

9.  What defines bins in a Doppler filter bank?

a)  Frequency bands

b)  Amplitude ranges

c)  Time segments

d)  Phase angles

 

 

 

10.  What is the name for unwanted returns from the ground?

a)  Rubbish

b)  Clutter

c)  Specular ambiguity

d)  Frequency inversion

 

 

 

Precision and accuracy - RF Cafe11.  Match each picture with what it represents.

A)  __

B)  __

C)  __

D)  __

High accuracy,

 high precision

High accuracy,

 low precision

Low accuracy,

 high precision

Low accuracy,

 low precision

 

 

 

12.  Which type of pulse repetition frequency (PRF) results in unambiguous range?

a)  High

b)  Medium

c)  Low

d)  All three

 

 

 

 

Need some help?

Click here for the answers and explanations.


Quizzes from vintage electronics magazines such as Popular Electronics, Electronics-World, QST, Radio-Electronics, and Radio News were published over the years - some really simple and others not so simple. Robert P. Balin created most of the quizzes for Popular Electronics. This is a listing of all I have posted thus far.

RF Cafe Quizzes

Vintage Electronics Magazine Quizzes

Vintage Electronics Magazine Quizzes

Vintage Electronics Magazine Quizzes

 

Innovative Power Products (IPP) 90 deg Hybrid Couplers
PCB Directory (Manufacturers)

Anritsu Test Equipment - RF Cafe

Innovative Power Products Passive RF Products - RF Cafe