The project I am looking into is to detect small inexpensive tags when placed inside a panelled delivery van when it passes a fixed reader, assuming worst case that the van is mostly metal sides, bottom, roof and doors with no windows what would be the best frequency to use if it was possible to receive a signal through the small ammount of minimal RF leakage that will occur through door seals, air vents etc etc?
The frequency must be license free.
From what I remember about wave theory the smaller the wavelength the better for effectively squeezing through small gaps. Do glass and most plastics have any particular frequencies that they are particulary absorbant to RF?
The tags will be self powered.
The readers can be placed about 5m from the van.
About 95% success rate or better is needed.
The frequency must be license free.
From what I remember about wave theory the smaller the wavelength the better for effectively squeezing through small gaps. Do glass and most plastics have any particular frequencies that they are particulary absorbant to RF?
The tags will be self powered.
The readers can be placed about 5m from the van.
About 95% success rate or better is needed.