[no subject]

On Wednesday 07 January 2004 07:20 pm, Michael Mealling wrote:
> On Wed, 2004-01-07 at 13:54, Mike Murphy wrote:
> > question: what's the typical range at which one can get data out
> > of an RFID chip?
>
> Given the following assumptions:
>
> 1) nothing between the chip and the reader
>
> 2) a good, expensive antenna
>
> 3) the chip is not moving
>
> 4) and the chip is a high quality design (good power, good antenna)
>    (this usually means the entire tag is about 6-8 inches square)
>
> Then you can usually get a greater than 90% read rate around 25
> feet. Think of the size of a typical dock door and you get the idea
> of the intended ranges.
>
> The readers that I've been playing with cost about $5,000 and can
> read even poor quality tags within about 1-2 feet reliably.
>
> The reader I describe above with teh 20 foot range costs around
> $50,000 I think....
>
> -MM
>
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> Ale at ale.org
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</pre>
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<ul><li><strong>References</strong>:
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<li><strong><a name="00205" href="msg00205.html">[ale] Radio-frequency identification (RFID) chips</a></strong>
<ul><li><em>From:</em> PBoyington at polyengineering.com (Preston Boyington)</li></ul></li>
<li><strong><a name="00208" href="msg00208.html">[ale] Radio-frequency identification (RFID) chips</a></strong>
<ul><li><em>From:</em> mike at tyderia.net (Mike Murphy)</li></ul></li>
<li><strong><a name="00209" href="msg00209.html">[ale] Radio-frequency identification (RFID) chips</a></strong>
<ul><li><em>From:</em> michael at neonym.net (Michael Mealling)</li></ul></li>
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