Custom Search
Over 10000 Pages Indexed
Your Host
Click here to read about RF CafeKirt
Blattenberger

... single-
handedly
redefining
what an
engineering website
should be.

View the YouTube RF Cafe Intro Video Carpe Diem!
(Seize the Day!)

5CCG (5th MOB):
My USAF radar shop

Hobby & Fun

Airplanes and Rockets:
My personal hobby website

Equine Kingdom:
My daughter Sally's horse
riding business website -
lots of info

•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

Job Board

About RF Cafe©

RF Cafe E-Mail

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

| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 |
| 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 |
| 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 |

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.

Some of these books used in quizzes are available as prizes in the monthly RF Cafe Giveaway.

Note: Many answers contain passages quoted from the text.

 

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 Cafe

11.  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.

A Disruptive Web Presence

Custom Search
Over 10,000 pages indexed! (none duped or pirated)

Read About RF Cafe
Webmaster: Kirt Blattenberger
    KB3UON

RF Cafe Software

RF Cascade Workbook
RF Cascade Workbook is a very extensive system cascaded component Excel workbook that includes the standard Gain, NF, IP2, IP3, Psat calculations, input & output VSWR, noise BW, min/max tolerance, DC power cauculations, graphing of all RF parameters, and has a graphical block diagram tool. An extensive User's Guide is also included. - Only $35.
RF system analysis including
frequency conversion & filters

RF & EE Symbols Word
RF Stencils for Visio

Product & Service Directory
Personally Selected Manufacturers
RF Cafe T-Shirts & Mugs

RF Cafe Software

Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel