JED - May 2014 - 53

get" to "engage" to illustrate the limited
effectiveness of defensive EA to prevent
a threat from targeting the asset and a
higher effectiveness against an engagement by the threat in the end game.
The dashed portion of the green line
indicates the limitations of defensive
jammers. Two factors drive the limited effectiveness of defensive jammers
in the target/engage phase of the kill
chain: power and jamming resources.
A defensive jamming pod/capability is
only able to generate so much power,

and given that power dissipates through
free space inversely proportional to the
square of the range (inverse-square
law), the ability for the defensive jammer to "reach" out very far is limited.
This limitation is acceptable since a defensive jammer does not have to reach
out farther than it needs to defeat the
factor threat in the end game. This is
why defensive jammers are not generating an offensive EA effect across the
IADS; they are protecting only the jet
that is carrying the defensive jammer.
The Journal of Electronic Defense | May 2014

can achieve alone. IADS that lack an
actionable air picture from early-warning/GCI/height-finder/TA/BM
radar
will be forced to use organic SAM radar
for the entire kill chain from "find" to
"engage." To do this, SAMs must radiate
longer than normal, making cooperative targets for Blue Forces to perform
emitter geo-location and to attack the
SAM radar with ARMs. ARMs engage the
threat kill chain from TA to TI/MG and
is indicated by the purple horizontal
arrow above the vertical axes so as not
to confuse ARM effectiveness with nonlethal EA effectiveness.2

DEFENSIVE ELECTRONIC ATTACK
Finally, the right vertical axis in
green shows the effectiveness of nonlethal EA from a defensive jammer.
While both a stand-off jammer and a
"self-protect" jammer perform EA, their
roles are significantly different, which
is why it is important to differentiate
between offensive and defensive EA.
Offensive EA is attacking an IADS; defensive EA is preventing completion of
the threat kill chain against a single
Blue aircraft. Differentiating offensive
EA and defensive EA distinguishes not
only where in the threat kill chain an
EA asset is targeting, but also how the
EA asset is tactically employed. From a
jamming perspective, large beamwidths
provide the best defense against a radar threat in the endgame, but this also
provides a significantly poor offense
due to the low-power density resulting
from a large beamwidth. The advantage
of using defensive EA with offensive EA
is that it mitigates the degradation of
losing alignment from a stand-off/modified escort jammer. A defensive EA system on an aircraft always has alignment
with the protected entity. A defensive
jammer's strength is the ability to sever
the kill chain in the end-game scenario
(while always coupled with threat reactions and expendables). The green line
in Figure 1 shows a curved increase in
defensive EA effectiveness from "tarFOOTNOTE
2 The objective of this diagram is to teach the
concept, not to get into the weeds of specific
Pk (probability of kill) for High Speed AntiRadiation Missiles (HARM), Advanced AntiRadiation Guided Missiles (AARGM), or Air
Launched Anti-Radiation Missiles (ALARM).

Dielectric Laboratories
Introduces EW Series
Catalog Filters

53

* Smaller * Surface Mount

q
y
p
* Frequency Stable Over Temperature

DLI has been well known for build-to-performance custom filter technology tailored
to specific design applications. Now DLI is producing a line of catalog filters suitable
for a wide range of requirements. Our EW Series band pass filters are in stock
and ready to ship on demand.
More information on these filters and
other DLI solutions can be found in the
Resources section of our website:
http://www.dilabs.com
You can also contact DLI's sales/support
staff at sales@dilabs.com,
or phone (315) 655-8710.

682895_Dielectric.indd 1

Advancing Possibilities
With Ceramic Components

DIELECTRIC LABORATORIES * NOVACAP * SYFER TECHNOLOGY * VOLTRONICS

2/25/14 1:56 AM


http://www.dilabs.com http://www.dilabs.com

JED - May 2014

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

The View From Here
Conferences Calendar
Courses Calendar
From the President
The Monitor
Washington Report
World Report
Interview
European Helicopter EW
Advanced ASE And ESM Already On Some US Helicopters
Ground-Based COMINT Solutions
Fighting the Kill Chain: Concepts and Methods of Electronic Attack
EW 101
AOC News
Index of Advertisers
JED Quick Look
JED - May 2014 - cover1
JED - May 2014 - cover2
JED - May 2014 - 3
JED - May 2014 - 4
JED - May 2014 - 5
JED - May 2014 - The View From Here
JED - May 2014 - 7
JED - May 2014 - Conferences Calendar
JED - May 2014 - 9
JED - May 2014 - Courses Calendar
JED - May 2014 - 11
JED - May 2014 - From the President
JED - May 2014 - 13
JED - May 2014 - 14
JED - May 2014 - The Monitor
JED - May 2014 - 16
JED - May 2014 - 17
JED - May 2014 - 18
JED - May 2014 - 19
JED - May 2014 - 20
JED - May 2014 - 21
JED - May 2014 - Washington Report
JED - May 2014 - 23
JED - May 2014 - World Report
JED - May 2014 - Interview
JED - May 2014 - 26
JED - May 2014 - 27
JED - May 2014 - European Helicopter EW
JED - May 2014 - 29
JED - May 2014 - 30
JED - May 2014 - 31
JED - May 2014 - 32
JED - May 2014 - 33
JED - May 2014 - 34
JED - May 2014 - 35
JED - May 2014 - 36
JED - May 2014 - 37
JED - May 2014 - 38
JED - May 2014 - Advanced ASE And ESM Already On Some US Helicopters
JED - May 2014 - 40
JED - May 2014 - 41
JED - May 2014 - 42
JED - May 2014 - 43
JED - May 2014 - Ground-Based COMINT Solutions
JED - May 2014 - 45
JED - May 2014 - 46
JED - May 2014 - 47
JED - May 2014 - 48
JED - May 2014 - 49
JED - May 2014 - Fighting the Kill Chain: Concepts and Methods of Electronic Attack
JED - May 2014 - 51
JED - May 2014 - 52
JED - May 2014 - 53
JED - May 2014 - 54
JED - May 2014 - 55
JED - May 2014 - 56
JED - May 2014 - 57
JED - May 2014 - 58
JED - May 2014 - 59
JED - May 2014 - EW 101
JED - May 2014 - 61
JED - May 2014 - AOC News
JED - May 2014 - 63
JED - May 2014 - 64
JED - May 2014 - Index of Advertisers
JED - May 2014 - JED Quick Look
JED - May 2014 - cover3
JED - May 2014 - cover4
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