Stealth
Technology
AGNINAYAN S PATIL
1AP07EC004
ECE
AGENDA
Introduction
Evolution
Characteristics
Design process
Drawbacks
Counter stealth
Applications
Examples
Conclusion
WHAT IS STEALTH TECHNOLOGY ?
 Stealth is a technique of making an object
invisible.
 Stealth is an important technology used in military
operations.
 Stealth is also known as LO(low observable)
technology
EVOLUTION
From earliest days deception has been used to
gain advantage over the enemy.
Early combat aircraft in WW- I used camouflage to
make visual detection difficult.
Advent RADAR in late 1930’s and during WW-II
enabled early detection of aircraft .
In 1940’s a unique way with low RADAR cross
section strategic bombers developed.
In late 50’s and 60’s came LO planes with
compromised performance .
STEALTH
CHARACTERISTICS
Airframe shaped for
low radar cross section.
Use of radar absorbent
materials(RAM).
Minimized infrared
signature.
Reduced engine noise.
Reduced visual
signature.
“How to make things invisible”
DESIGN PROCESS
RADAR CROSS SECTION
RCS of a target is a measure of its size as
seen by the radar.
It’s a complex function of the geometric cross
section of the target.
RCS is a characteristics of the target not the
radar.
RCS of a metal plate
Large RCS but
decreases rapidly as the
incident angle deviates
from the normal
4a b
 2

2 2
RCS of metal sphere
Small RCS but
independent of the
incident angle.
  r
2
Aircraft high RCS area
Designed low observability areas
Comparative RCS
Radar Absorbing Material(RAM)
Nanostructural
composite materials
absorbing radar
waves without
reflecting.
RAM reduces the
radar cross section
making the object
appear smaller.
The other techniques are
Active cancellation
Passive cancellation
Plasma stealth
DRAWBACKS
Poor aerodynamic properties.
Requires high end electronic instruments and
software's.
High maintenance cost.
Limited amount of ordnance.
Counter Stealth Technology
Obtain stronger RADAR returns employing
sophisticated algorithm.
VHF and UHF radars
High frequency over the horizon radars(OTHRs).
BI-static and multi-static radar technology.
APPLICATIONS
Used in wind farms.
Civil aviation and launch
vehicles
Military applications.
LOCKHEED MARTIN F-22A
• Wing Span 44.5 ft
• Length
62 ft 1 in
• Wing area 830 sq. ft.
• Top Speed Mach 2+
• Range
800 Nm
• Altitude
65,000 ft
• Air Superiority
• Low Observable
B-2 SPIRIT
Adaptive water curtain technology
CONCLUSION
“The future is bright, the future is stealth….”
Thank You….