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From: pierson@ggone.enet.dec.com (Dave Pierson)
Newsgroups: sci.electronics
Subject: Re: R.A.M. (was Re: Police Radar Frequency Info)
Summary: lotsa little resistors
Keywords: RAM, Stealth, lossy
Message-ID: <23809@shlump.lkg.dec.com>
Date: 24 Jun 91 22:17:37 GMT
Sender: news@shlump.lkg.dec.com
Organization: Digital Equipment Corporation
Lines: 25

In article <1991Jun24.055534.24442@cs.mcgill.ca>, mingmar@cs.mcgill.ca
(Ming MAR) writes...
>I had posted a follow-up article asking the originator of this
>thread (Bill Dorsey) to explain how radar absorbing materials
>work.  I didn't get a response.
	From the published information, and EMI work (including anechoic
	chambers), consider a nonconductor, (glass, ceramic, plastic, loaded
	with carbon (lossy conductor) or ferrite.  Efectivenss will vary with
	thickness, wavelength of threat.  For a fixed threat frequency (police
	radar) a fixed thickness should do.  IF the elements providing the
	return ar properly identified and suppressed.

>Last year, there were reports out of Saudi Arabia about radar
>detection of F-117's.  For your edification, I include below my
>translation of an article about it.  Remember, the article was
>written before the F-117 was able to prove itself in the war.
	Thanks.  I can think of some questions to ask but....

thanks
dave pierson			|the facts, as accurately as i can manage,
Digital Equipment Corporation	|the opinions, my own.
600 Nickerson Rd
Marlboro, Mass
01752				pierson@cimnet.enet.dec.com
"He has read everything, and, to his credit, written nothing."  A J Raffles