Aerospace & Defense Technology - December 2021 - 10

Testing EMI Materials for
Battlefield Applications
A
erospace and defense technology
must operate reliably
in a wide variety of extreme
conditions, including very
high and very low temperatures and
amid saltwater and harsh chemicals
(from deicing fluids to missile fuel). Further,
manufacturers must meet stringent
requirements. As a result, the testing regimen
involved in ensuring battlefield
readiness is complex and multifaceted -
not only for the devices that end up in
soldiers' hands, but also for the many
component parts that make those devices
work.
We've spent decades developing the
materials that mitigate electromagnetic
interference in aerospace and defense
electronics. The testing regimen for
these EMI materials has grown more
complex and multifaceted in recent
years, for a couple reasons:
* Electronics are getting smaller and
more powerful (which results in more
component parts in tighter spaces). A
crowded PCB equals more complex
signal challenges.
* Aerospace and defense electronics operate
across a wider range of frequencies
than ever before. Therefore, EMI
materials must perform with precision
at targeted frequency ranges (from frequencies
as low as 100 MHz to frequencies
as high as 95 GHz), adding another
variable to the testing equation.
The testing processes for these EMI
materials is crucial to battlefield performance.
After all, if a microwave absorber
material corrodes when exposed
to saltwater, it can hinder the effectiveness
of an entire communications system.
Or, if an elastomer outgasses in an
optical lens, it could lead to circuit failure.
Given the complexity of the challenges
aerospace and defense design engineers
face today, testing of these component
parts must cover:
* Temperature ranges;
* Mechanical performance;
* Fuel (and other harsh fluid) resistance;
* Frequency range performance.
The tools and methodologies necessary
to perform these tests vary. The key for
aerospace and defense electronics manufacturers
is to recognize the complexity of
the challenges before them and embrace
a holistic approach to testing. The testing
of EMI materials must be rigorous and designed
to predict performance over the
lifetime of a material. With this comprehensive
approach to testing in place, design
engineers will ensure EMI materials
improve the overall performance of mission-critical
electronics.
10
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Aerospace & Defense Technology - December 2021

Table of Contents for the Digital Edition of Aerospace & Defense Technology - December 2021

Aerospace & Defense Technology - December 2021 - Intro
Aerospace & Defense Technology - December 2021 - Sponsor
Aerospace & Defense Technology - December 2021 - Cov1
Aerospace & Defense Technology - December 2021 - Cov2
Aerospace & Defense Technology - December 2021 - 1
Aerospace & Defense Technology - December 2021 - 2
Aerospace & Defense Technology - December 2021 - 3
Aerospace & Defense Technology - December 2021 - 4
Aerospace & Defense Technology - December 2021 - 5
Aerospace & Defense Technology - December 2021 - 6
Aerospace & Defense Technology - December 2021 - 7
Aerospace & Defense Technology - December 2021 - 8
Aerospace & Defense Technology - December 2021 - 9
Aerospace & Defense Technology - December 2021 - 10
Aerospace & Defense Technology - December 2021 - 11
Aerospace & Defense Technology - December 2021 - 12
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Aerospace & Defense Technology - December 2021 - 40
Aerospace & Defense Technology - December 2021 - Cov3
Aerospace & Defense Technology - December 2021 - Cov4
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