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The primary way to block a signal is to enclose the signal generating device, in this particular case, the RFID chip in your key fob, in conductive metal - i.e. steel, or aluminum, or gold, or copper, etc. That is what a Faraday Cage is designed to do. Faraday Cages also are employed by military to negate the effects of EMP/Electromagnetic Pulse to protect military electronics as are generated by nuclear detonations. In the military, these are found on hangared aircraft , or radio receivers to basically route the electrical charge around the electronics and grounding it. For that use a steel (or other conductive metal) is employed, usually as a tight weave mesh draped over the object. But for radio wave signals to be blocked it is best to enclose the object to be protected in a conductive metal full enclosure. For example, a metal box with a fitted lid to prevent stray radio signals escaping.

[URL unfurl="true"]https://en.wikipedia.org/wiki/Faraday_cage[/URL]

Late Life Crisis

<blockquote data-quote="Late Life Crisis" data-source="post: 192065" data-attributes="member: 4152">The primary way to block a signal is to enclose the signal generating device, in this particular case, the RFID chip in your key fob, in conductive metal - i.e. steel, or aluminum, or gold, or copper, etc.&nbsp; That is what a Faraday Cage is designed to do.&nbsp; Faraday Cages also are employed by military to negate the effects of EMP/Electromagnetic Pulse to protect military electronics as are generated by nuclear detonations.&nbsp;&nbsp; In the military, these are found on hangared&nbsp; aircraft , or radio receivers to basically route the electrical charge around the electronics and grounding it.&nbsp; For that use a steel (or other conductive metal) is employed, usually as a tight weave mesh draped over the object.&nbsp; But for radio wave signals to be blocked it is best to enclose the object to be protected in a conductive metal full enclosure.&nbsp; For example, a metal box with a fitted lid to prevent stray radio signals escaping.[URL unfurl=&quot;true&quot;]https://en.wikipedia.org/wiki/Faraday_cage[/URL]Late Life Crisis</blockquote>

[QUOTE="Late Life Crisis, post: 192065, member: 4152"] The primary way to block a signal is to enclose the signal generating device, in this particular case, the RFID chip in your key fob, in conductive metal - i.e. steel, or aluminum, or gold, or copper, etc. That is what a Faraday Cage is designed to do. Faraday Cages also are employed by military to negate the effects of EMP/Electromagnetic Pulse to protect military electronics as are generated by nuclear detonations. In the military, these are found on hangared aircraft , or radio receivers to basically route the electrical charge around the electronics and grounding it. For that use a steel (or other conductive metal) is employed, usually as a tight weave mesh draped over the object. But for radio wave signals to be blocked it is best to enclose the object to be protected in a conductive metal full enclosure. For example, a metal box with a fitted lid to prevent stray radio signals escaping. [URL unfurl="true"]https://en.wikipedia.org/wiki/Faraday_cage[/URL] Late Life Crisis [/QUOTE]

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