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Is a Detuned Antenna a Problem for HF (Non-propagating Wave Case) RFID?
Is there a cause for concern if an antenna come in contact with metal?
Yes, any antenna that comes in direct contact with metal will be detuned. However, high-frequency (HF) and low-frequency (LF) antennas can be located closer to metal without performance degradation than a passive ultrahigh-frequency (UHF) antenna can.
—Mark Roberti, Founder and Editor, RFID Journal
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