What is Embeddable In-Metal RFID and How Does It Work?

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Embeddable in-metal RFID technology represents a significant advancement in RFID capabilities, allowing tags and readers to function effectively even when embedded within metal. This technology addresses challenges faced by traditional RFID systems, which struggle to transmit signals through metal barriers. The effectiveness of in-metal RFID can be influenced by the thickness of the metal, with limitations that vary by application and technology used. There are also drawbacks compared to standard low-frequency (LF) and high-frequency (HF) systems, particularly in terms of signal range and potential interference. Overall, this evolution in RFID offers promising solutions for industries requiring reliable tracking in metal environments.
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I am new to RFID but relatively familiar with how it works and its limitations. However, I recently learned of an advancement in the tech known as embeddable in-metal RFID, which appears to be a newer evolution in the tech and a product offered by very few suppliers thus far. I believe this type of RFID may address a problem I've been trying to solve for some time - unfortunately there seems to be very little information available on the web.

So can anyone here explain this evolution in RFID tech to me? How exactly do these readers/tags penetrate metal? Is there a limit to the thickness of the metal material the tag or reader is embedded in? What are the drawbacks of this type of system vs the standard LF/HF systems that cannot send/receive signals through metal?
 
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