RF Tracking Device - Radar? For locating devices?

[BoomerX01]

I have a consider amount of Dell Axim's PDA's that I want to keep track of using an RF system. People have been stealing them at our events, they are just loan devices. My question is, where should look to find a system that allows me to:

1) Place a ID tag on each device
2) Have a software interface to track the devices (using a radar or something)
3) Will let me know where the devices are in a given area, similar to the stores having you walk through a dector that beeps when you steal clothes.

Any links are greatly appreciated!!

 

[Shmuckety]

Try google first. I found this in 6 seconds of looking.

http://www.barcodebook.com/html/rfid.html

What I found is not cheap, but i didn't expect it to be.

 

[BoomerX01]

I been doing google as well, but man, this stuff doesnt seem very cost effective. THe devices are worth about $300, yet it costs hundreds just to track them!

 

[devman]

I'm not sure RADAR is the proper search term . Its more of just a radio signal.

 

[Shmuckety]

I know what you mean, but RADAR stands for Radio Detection and Ranging

 

[devman]

When you said radar first thing that popped in to my head was ranging, like bouncing signals off an object, completely forgetting that there are passive forms of radar .

 

[BoomerX01]

WiFi ID Tracking, thats what I need. But damn, its expensive!!