Path: utzoo!mnetor!uunet!husc6!cmcl2!brl-adm!umd5!ames!ucbcad!ucbvax!ALLSPICE.LCS.MIT.EDU!dab
From: dab@ALLSPICE.LCS.MIT.EDU
Newsgroups: comp.protocols.tcp-ip
Subject: Re: Ethers, Copper, Fiber, Microwaves, Etc.
Message-ID: <8712101810.AA00864@PTT.LCS.MIT.EDU>
Date: 10 Dec 87 18:10:03 GMT
References: <16836@bu-cs.BU.EDU>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 17


>	Now this is something new to me.  If you can put them in a
>briefcase they must be around 100GHz.  That would probably limit the
>range to a mile or so.  The problem with infrared laser technology is
>the atmospheric attenuation of smog, fog, and rain.  Sounds like this
>new ultra-high freq microwave fills the gap between low freq uwave and
>infrared. 

	In the ham radio community for several years there have been
devices called Gunnplexers available (I don't know if that's a brand
name or a generic name) which are a 10 GHz microwave system for about
$200.  When they first showed up there were several articles in ham
radio magazines descibing how to send video through them, so 10 Mb/sec
is probably not too far out of line.  Except for maybe the feedhorn
(or the dish itself) it would easily fit into a briefcase.  The range
is limited but I think to line of sight rather than 1 mile.
						Dave Bridgham