Wireless Switch, Passive UHF RFID

Discussion in 'Wireless & RF Design' started by Col, Oct 10, 2014.

  1. Col

    Thread Starter Member

    Apr 19, 2012
    44
    2
    Hi,
    I would like to implement a passive wireless switch with possibility for IDs for about 5 nodes. I need to activate and deactivate some passive sensors so a kind of ON/OFF or SPST would work or a digital switch that can provide 1V and 100nA for a MOSFET

    I thought my prayers had been answered by the NXP G2iL+ RFID (http://www.nxp.com/documents/data_sheet/SL3S1203_1213.pdf) chip which provides a digital output. Indeed I made this work passively at close range to my reader antenna with high power. Unfortunately, while not stated in the data sheet the switch appears to only work in active mode, when the chip is powered, and unknown to me in my initial tests my 30dBm 868MHz had induced a sufficient voltage on the VDD wire to power the chip 'actively'

    Is there any other passive RFID chip that can provide 1V, 100nA to an output pin, or can provide a kind of SPST. Or are there are any 'out of the box' ideas for a hack?

    Thanks
     
  2. Col

    Thread Starter Member

    Apr 19, 2012
    44
    2
    Any ideas guys?
    I'm not looking at adding a power supply to the RFID, not a desirable solution for a passive sensor
     
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