You might also try these guys...
http://www.datasci.com/products/implantable_telemetry/transmitters.asp

James Newtons Massmind wrote:
> So... Here's a fun one for the RF people over the holiday.
>
> We need to xmit data from a logger INSIDE a body over a range of a few feet.
>
> And it has to be micro power. 
>
> And it has to be faster than 56Kb.
>
> Has anyone done it?
>
> Has anyone tested the fall off of RF from inside a body as frequency
> increases?
>
> Has anyone any idea how you go about figuring out what frequency to use?
>
> Has anyone any idea how to setup a test to see find out how the signal falls
> off as the frequency increases?
>
> ---
> James.
>  
>
>   
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