JED - July 2014 - 52

E W101
Chaff, which comprises a large number of half wavelength pieces of aluminum foil or plated strands of fiberglass,
can be deployed to form a "chaff cloud"
that has a very large radar cross section.
An active decoy, as shown in Figure
5, includes electronic gain to create a
radar cross section. This can either be
an amplifier or a primed oscillator that
generates a powerful signal to simulate a
radar return from an object much larger
than the decoy, but with the same frequency and modulation as the signal
produced by the target radar. As we
will see later in this series, the signal
returned to the radar must sometimes
have complex modulation to avoid being
rejected as a false signal by the radar.

TOWED
EXPENDABLE
INDEPENDENT
MANEUVER

TOWED

Figure 6: Decoys can be separated from the platforms they protect by being expended or towed, or
by independently maneuvering.

DEPLOYMENT OF RADAR DECOYS
Radar decoys must be physically separated from the platforms they protect against radar controlled weapons. As shown
in Figure 6, this separation can be achieved by expending decoys from the protected platform, by towing decoys behind the
platform, or by independently maneuvering those decoys. There
are important examples of decoys using each of these deployment techniques that will be discussed in detail in this series.

As you will see, the features and capabilities of modern radars have had great impact on the nature of each of these
types of decoys.

WHAT'S NEXT
Next month, we will discuss saturation decoys. For your
comments and suggestions, Dave Adamy can be reached at
dave@lynxpub.com. a

The Journal of Electronic Defense | July 2014

52

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JED - July 2014

Table of Contents for the Digital Edition of JED - July 2014

The View From Here
Conferences Calendar
Courses Calendar
From the President
The Monitor
Washington Report
World Report
The Art of Fusion – Ew and Radar for Fighter Aircraft
EPAWSS: F-15 Ew Upgrade Ready to Launch
Technology Survey: Airborne Ir Decoys and Dispensers
EW 101
New Products
AOC Election Guide
AOC News
Index of Advertisers
JED Quick Look
JED - July 2014 - cover1
JED - July 2014 - cover2
JED - July 2014 - 3
JED - July 2014 - 4
JED - July 2014 - 5
JED - July 2014 - The View From Here
JED - July 2014 - 7
JED - July 2014 - Conferences Calendar
JED - July 2014 - 9
JED - July 2014 - Courses Calendar
JED - July 2014 - 11
JED - July 2014 - From the President
JED - July 2014 - 13
JED - July 2014 - 14
JED - July 2014 - The Monitor
JED - July 2014 - 16
JED - July 2014 - 17
JED - July 2014 - 18
JED - July 2014 - 19
JED - July 2014 - 20
JED - July 2014 - 21
JED - July 2014 - 22
JED - July 2014 - 23
JED - July 2014 - Washington Report
JED - July 2014 - 25
JED - July 2014 - World Report
JED - July 2014 - 27
JED - July 2014 - The Art of Fusion – Ew and Radar for Fighter Aircraft
JED - July 2014 - 29
JED - July 2014 - 30
JED - July 2014 - 31
JED - July 2014 - 32
JED - July 2014 - 33
JED - July 2014 - 34
JED - July 2014 - 35
JED - July 2014 - 36
JED - July 2014 - 37
JED - July 2014 - EPAWSS: F-15 Ew Upgrade Ready to Launch
JED - July 2014 - 39
JED - July 2014 - 40
JED - July 2014 - 41
JED - July 2014 - 42
JED - July 2014 - Technology Survey: Airborne Ir Decoys and Dispensers
JED - July 2014 - 44
JED - July 2014 - 45
JED - July 2014 - 46
JED - July 2014 - 47
JED - July 2014 - 48
JED - July 2014 - 49
JED - July 2014 - EW 101
JED - July 2014 - 51
JED - July 2014 - 52
JED - July 2014 - New Products
JED - July 2014 - 54
JED - July 2014 - AOC Election Guide
JED - July 2014 - 56
JED - July 2014 - 57
JED - July 2014 - 58
JED - July 2014 - 59
JED - July 2014 - 60
JED - July 2014 - 61
JED - July 2014 - 62
JED - July 2014 - AOC News
JED - July 2014 - 64
JED - July 2014 - Index of Advertisers
JED - July 2014 - JED Quick Look
JED - July 2014 - cover3
JED - July 2014 - cover4
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