Subject: New Ultra Wide Band technology (Milnes)(Curry).
Date: Mon, 28 Aug 2000 112209 -0500
From: Roy Beavers
To: guru
--------------------------------------------------
-------- Original Message --------
Subject: Re: New Ultra Wide Band technology (Milnes).
Date: Mon, 28 Aug 2000 11:16:19 -0500
From: "Bill P. Curry"
Reply-To: BPCurry@MCS.com
Organization: EMSciTek Consulting co.
To: roy@emfguru.com
References: <39AA66A7.404A6BF9@emfguru.com>
Roy & Lyn,
I suspect that a wideband RF meter with flat response, operating in peak
detection mode, could detect these pulses. However, it might not give
accurate intensities. The technology seems to be an extension of CDMA phone
protocol, and I can detect CDMA pulses when the meter is in peak detection
mode, though, when my meter is in averaging mode, I find it very difficult to
detect them.
Also, the Fourier transform of a sharp pulse is a very wide stepctrum, so I
would expect that if the spectrum were measured and inverse transformed (by a
Fast Fourier Transform algorithm) one might be able to recover the original
pulse shapes. Wheter that is practical, I don't know. Those frequency
components that fall below th e noise level are unrecoverable.
A pertinent point that I want to mention is that Brooks AFB found induced
hypotension in laboratory animals when exposed to UWB radiation. This is the
first stage of RF sickness. At later stages (where I read this, I can't
remember) there is hypertension, instead of hypotension. Thus, having a wide
spectrum does not prevent the biological effects from occurring.
Roy Beavers wrote:
>
> ......From EMF-L.........
>
> -------- Original Message --------
> Subject: New Ultra Wide Band technology (UWB)
> Date: Mon, 28 Aug 2000 12:08:36 +1200
> From: "llm"
> To: "Roy Beavers"
> References: <39A982E4.29BC98C@emfguru.com>
>
> Dear Roy,
>
> May I enclose a summary sent to a different list, evidently from
> an article in "Monitoring Times” magazine (I have not checked the
> original, lack of time).
>
> It seems this technology would make it harder for monitoring of
> emissions in order to protect
> populations from them. How do you prove a certain source caused
> ill-effects, if the signals
> are undetectable?
>
> Yours sincerely,
>
> Lyn Milnes
>
>
> FCC PROPOSES TO UNLEASH
>
> NEW ULTRA WIDE BAND TECHNOLOGY.
>
> The next wave in radio transmission technology may be Digital
> Pulse Radio (UWB, ultra wide band).
>
> It opens up virtually infinite bandwidth in the
> existing electromagnetic spectrum. Nobody has even heard of it,
> but it's going to explode on the scene.
>
> UWB uses small on-off
> bursts of energy at extremely low power but over an extremely wide
> section of the radio spectrum -- only a minute amount of energy is
> radiated at any single frequency. UWB systems fall into two
> categories: systems that use radar techniques for precise
> measurements of distance and detection or imaging of objects; and
> communicating systems that can be used for voice, data and control
> signals.
>
> Similar to Spread Spectrum modulation, the precisely
> timed, extremely short, coded pulses carry much more than
> conventional communication systems and can support an unlimited number
>
> of users.
>
> UWB IS VIRTUALLY IMPOSSIBLE TO JAM OR DETECT
> making it ideal for an assortment of applications
> ranging from network to through-the-wall-radar
> radar and secure communication systems. (emphasis added)
>
>
> UWB can operate on spectrum already occupied by existing radio
> services at power so low that cannot be distinguished from the
> existing low level background noise ..except by the receiver to
> which it is directed.
>
> "Monitoring Times" - Aug 2000, Vol.19, No.8, page 4
>
--
----
Bill P. Curry, Ph.D. |Physics is fun.
EMSciTek Consulting Co. |Trying to make a living!
22W101 McCarron Road, |Phone: (630) 858-9377
Glen Ellyn, IL 60137 |Fax: (630) 858-9159 with prior notice
Web page: http://www.EMSciTek.com
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Reprinted with permission of Roy Beavers, http://www.emfguru.com