Re: Ethers, Copper, Fiber, Microwaves, Etc.


dab@PTT.LCS.MIT.EDU
Thu, 10 Dec 87 13:10:03 EST


> 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



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