On Wed, 12 Mar 2003, Declan McCullagh wrote: > This is incorrect. I interviewed one RFID tag maker who said up to 15 > feet in free space. Presumably a beefier transmitter or a more > sensitive receiver would allow longer ranges.
I stand corrected, the one by Matrics looks very nice indeed: http://www.matricsrfid.com/pdf/Tech_Overview_Data_Sheet.pdf runs at 900+ MHz which gives it a good few meters range. However, it still gets it's power from an outside source, so you can easily tell when one is getting sampled. Fortunatly the higher the frequency, the easier it is to shield. I still think it's an over reaction to inventory control, but I guess it'd be a ton of fun to build a reader and play with these things as people walk down the street, just to see what you can see :-) Patience, persistence, truth, Dr. mike
