- #1
paul_harris77
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For an engineering project I am trying to place a 2.4GHz RFID tag inside a resin casting of a large seaside pebble. However since the resin is less dense than a real pebble, I need to add some mass of metal (since is is much denser) to the resin before it sets. It is crucial for the casting to have the same moment of inertia as a real pebble and so as uniform a distribution of metal inside the casting as possible. The only way I can think of doing this is to use a large amount of iron filings added to the resin mixture before it sets. This means the gaps between the filings will be much smaller than the wavelength of the 2.4GHz signal.
Will this significantly attenuate the signal into / out of the RFID antenna inside the resin pebble, or are the filings so thin that it would make as little as no difference?
Any help would be greatly appreciated.
Many thanks
Paul
Will this significantly attenuate the signal into / out of the RFID antenna inside the resin pebble, or are the filings so thin that it would make as little as no difference?
Any help would be greatly appreciated.
Many thanks
Paul