Originally Posted by rob13572468
there is plenty of info available to the public on just what techniques are needed to divert radar energy and what materials do a good job of absorbing them. all it takes is perseverance and the ability to do objective testing of candidate materials until one is found that works well.
There are a couple of problems with attempting to defeat radar. Many of the radar absorbent coatings that are available work very well at specific frequencies. They may not work at all at other frequencies. I don't know if the various police radar frequencies are close enough together or not for this to help or hurt. Other methods include a "wire" mesh of specific spacing, again frequency dependent. The "paint" coatings that absorb "everything" tend to be very expensive.
Building deflector shields can be effective, but can also be difficult given the confines of the structure of the car, and one wrong angle, and you may generate a radar reflector, returning a stronger signal than nothing at all.
Additionally, for a project I worked on many years ago, you may have problems with things you wouldn't even think about, such as tires.
In particular, I once worked on a project that was attempting to combine AI with a scanning Doppler radar for remote site security. The idea was to scan the approach to the site and attempt to identify what was approaching it. I say this, because one of the test "objects" was a rider on a three wheel ATV. The radar passed right through the fenders of the ATV and reflected back off the tires. The ATV approached the radar at about 20 MPH. As the radar scanned left to right, it detected an area of Doppler shift at 40 MPH, a large area of 27 MPH, and another area of 40MPH. In each area, it was recording the highest approaching speed. What it was seeing was the top of one of the rear tires (it's approach speed was 40), the rider/ATV/front tire (although the tire was coming at 40, the rest was coming at 20, so it averaged to around 27 or so), and finally the other rear tire at 40. The results were confusing at first until we figured out what was going on.
This was all in contrast to the jeep that was recorded at a constant 20 MPH over it's profile, since the wheels were covered by sheet metal.
Bottom line? You can probably make the Elise invisible to radar. It will cost you a lot. It will take a lot of work. You will need the right equipment, and knowledge to design, implement, and most importantly test whatever you design. Then Ladar would probably still work on your car anyway, as will timing from the sky, and Vascar units.
But if anyone ever gets a cheap source of radar absorbing paint for the inside of the clam, I'm in for a group buy.