True. I can imagine sensors in roads that can not only read vehicles traveling over them, but can also scan tire sensors and possibly other NFC tags. 13.56 MHz tags have ranges of up to 5 feet. 433 Mhz tags can read over a mile away with proper antennas. 860 - 960 MHz tags typically have a range of 7 feet and can be designed for substantially higher ranges. 2.45GHz tags operate in the same band as WiFi and can exceed 160 feet.
Passive tags are designed to be cheap to make and require no direct power. That's not the same as only having NFC limits. Mostly those limits are there because typical use cases involve small devices with close proximities. Given a desire to read RFID tags at long distances only requires sufficient power and antennas to accommodate the requirements.
Not sure on the standards, but usually lower frequencies would have the highest range. 13.56MHz would technically have the longest distance.
The optimal antenna for 13.56MHz would be fairly long 217.6991 inches. Maybe they use a shorter antenna, hence the only 7 feet range due to less than optimal antenna. 433MHz would have an antenna length of 6.8176 inches, that would be easy to fit in a tire.
Fucking sickening they do this shit, they obviously place it in the middle of the rubber so you cannot remove it without destroying the tire. I doubt anyone would be able to change the values, as it probably has only PROM or similar non-writable memory.
I was thinking the same. I suspect that each RF device is designed with specific characteristics, either way, it's interesting how many ways we are be surveilled or at least how many ways it's possible.
I'm wondering how powerful an EMP would need to be to effectively destroy tags.
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