Micro scale radio transceiver for a sensor network demo

For a Micro scale radio transceiver for a sensor network demonstration, roI'm looking for a very small and light weight radio tranceivers capable of
transmitting and receiving digital data within 3 meters radius.
Followings are desired specifications; Weight : Less than 5 grams (including battery, probably a tiny watch battery) Size : as small as possible Operation life time : 5 hours operation with a new battery Bit rate : 9600 baud (or faster) Communication range : 3 meters Capable of operating in the presence of multiple other active transceivers of the same kind within 3 meters. This effectively means that multiple transceiver can simulataneously communicate with each other and/or a host. (It is acceptable if transceivers required to be programmed to have unique addresses prior to experiments.) Capable of operating on a moving platform (including on a human or animal)
Any suggestion will be highly appreciated.
Regards,
Gustav Gorev
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Hallo Gustav,
Gustav Gorev wrote:

Have a look at http://www.sentec-elektronik.de (available in english :-)).
Regards, Kurt
--
Kurt Harders
PiN -Prsenz im Netz GITmbH
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Hello Gustav,
Nordic has a lot of RF transceiver chips: http://www.nvlsi.com /
Regards, Joerg
http://www.analogconsultants.com
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