Updated July 16,
here to go to our main page on microwave materials
We have a three-part tutorial
on radar cross-section reduction:
one reviews the fundamentals of electro-magnetic waves.
two is on radar cross-section physics.
three discusses radar absorbers and absorption mechanisms.
Absorbing materials serve many
functions in microwave engineering. Low density foams impregnated
with lossy material are used to make the familiar radar-absorbing
"pyramids" in anechoic chambers. Sometimes when you have
a nasty moding problem, the best solution is to coat the lid with
absorbing material. A lot of highly expensive defense equipment
is coated with radar-absorbing coatings. But we've had inquiries
from people that want to make their Corvette stealthier to avoid
Before we go any further, the
microwave industry often uses the adjective "absorptive"
to describe absorbing materials. A lot of engineers mispronounce
and misspell the word, like absorbive or absorbative. Get it straight,
or get another job!