Stealth and microwave radar

[Tom Potts]

Watching a program on spy planes last night it occured to me that while
they may be invisible to microwave radar they should stick out like a
sore thumb to radar where the wavelength is of a similar order of
magnitude to the plane itself.

[lewradar]

Post by Tom Potts
Watching a program on spy planes last night it occured to me that while
they may be invisible to microwave radar they should stick out like a
sore thumb to radar where the wavelength is of a similar order of
magnitude to the plane itself.

Which is why the Russians and Chinese feel they can sell various VHF radars
as "anti-stealth" :-)

lewradar

[Tom Potts]

I was thinking more of shortwave (wavelength 2x ->1/8th the size of the
target)

[rick]

Post by Tom Potts
Watching a program on spy planes last night it occured to me
that while
they may be invisible to microwave radar they should stick out
like a
sore thumb to radar where the wavelength is of a similar order
of
magnitude to the plane itself.
============

I was thinking that one wouldn't need a RADAR set at all. Our
airwaves are filled with freqs of all kinds.
A massive computer-based Rx that picks out reflections from known
sources would work. Since part of stealth is having angles that
reflect off to the side, Rx returns from multiple point sources
would show these said reflections.
These multiple points could include radios stations, current
RADARs, etc.

[One Usenet Poster]

Post by rick

Post by Tom Potts
Watching a program on spy planes last night it occured to me
that while
they may be invisible to microwave radar they should stick out like a
sore thumb to radar where the wavelength is of a similar order of
magnitude to the plane itself.
============

I was thinking that one wouldn't need a RADAR set at all. Our
airwaves are filled with freqs of all kinds.
A massive computer-based Rx that picks out reflections from known
sources would work. Since part of stealth is having angles that
reflect off to the side, Rx returns from multiple point sources
would show these said reflections.
These multiple points could include radios stations, current
RADARs, etc.

Been there, done that, got the T-shirt. Google "Silent Sentry".

Mike

[Muddy]

It would seem hard to target an aircraft with Silent Sentry Radar
system, not what its designed for, and any missiles shot at a stealth
air frame still have the problem of greatly reduced I/R and Radar
signals from most angles. Even with multiple FM Radio stations, a
Stealth Aircraft isn't going to be easy to see unless you get lucky
with relative transmitter( not under your control) and receiver
control.

Note I have a questions about effective signal strength the claim for
FM stations. Its true a radio station may a emit a signal of millions
of watts, but its Att. Gain is going to be really poor. I not sure
what kind of gain they get, but I would be stunned if its more than 1.5
or so, since they broadcast in 360 degrees in azimuth, and a good
number of degrees in elevation. Its looks like the gain is one to me,
but I may be missing something. Does anyone know what the radiation
pattern looks like from a FM station.