Important missing piece in explaining frequencies as it pertains to UHF RFID: A point of concern is the extent to which particular RFID tags can be read or written in different countries, given their different frequency bands. A person new to the field might imagine that Tags need to be selected that operate on the same frequency as the Reader in order to communicate, just like in other types of radio equipment. This is not really true. A key to this subject is the way in which Tags respond to commands from the Reader: The Tag signals via pulses that consist of switching its antenna between resonating-and-reradiating (reflecting) the incoming signal, and not resonating/reflecting the incoming signal. This scheme is referred to as "backscatter". The Reader listens for these backscatter pulses, and interprets them as a message responding to its recent command. Withing the "pulsating reflection", the individual reflected pulses are bursts of the underlying frequency as sent by the Reader, whether the Reader is operating at 860MHz, 900MHz, 920MHz or 950MHz etc. So whatever frequency the Reader is set to (per the current location), the Tag's response reflects that same frequency, which is obviously exactly what the Reader is listening for. To make this work, Tag's antenna needs geometry that causes it to more or less resonate when it receives signals anywhere in that frequency range. That said, different Tags will, by accident or by design, have different degrees of sharp tuning ("Q" factor). Sharper tuning means a stronger reflection when operating near the center of the tuning range, but weaker outside that range, compared to a more-broadly tuned antenna. So that is a factor that might play into selecting one Tag over another, though in general, Tags intended for UHF RFID will operate at least somewhat across the entire band. If you know the Tags will only be used in one region, you might select a more-sharply-tuned Tag in order to achieve maximum range, it that's important to your application.
There is certainly a lot to say on the topic of frequency, but for the sake of keeping my content short and as simplistic as possible, I covered the basics in this. If you have certain things you’d like a deeper explanation on, please comment below and I can put that in a longer form video! Thanks for engaging!
@@techmadesimple-ColynnBlack European freq, Chinese freq,us freq, tag freq, encoding types., most used encoding, most used programs to.encode , the math of encoding and decoding
Thanks for the explanation, but please i need to know how to duplicate the smart lock card, please answer me question, because I don’t know how can I make one more access copy for the door.
Important missing piece in explaining frequencies as it pertains to UHF RFID: A point of concern is the extent to which particular RFID tags can be read or written in different countries, given their different frequency bands. A person new to the field might imagine that Tags need to be selected that operate on the same frequency as the Reader in order to communicate, just like in other types of radio equipment. This is not really true. A key to this subject is the way in which Tags respond to commands from the Reader: The Tag signals via pulses that consist of switching its antenna between resonating-and-reradiating (reflecting) the incoming signal, and not resonating/reflecting the incoming signal. This scheme is referred to as "backscatter". The Reader listens for these backscatter pulses, and interprets them as a message responding to its recent command.
Withing the "pulsating reflection", the individual reflected pulses are bursts of the underlying frequency as sent by the Reader, whether the Reader is operating at 860MHz, 900MHz, 920MHz or 950MHz etc. So whatever frequency the Reader is set to (per the current location), the Tag's response reflects that same frequency, which is obviously exactly what the Reader is listening for.
To make this work, Tag's antenna needs geometry that causes it to more or less resonate when it receives signals anywhere in that frequency range. That said, different Tags will, by accident or by design, have different degrees of sharp tuning ("Q" factor). Sharper tuning means a stronger reflection when operating near the center of the tuning range, but weaker outside that range, compared to a more-broadly tuned antenna. So that is a factor that might play into selecting one Tag over another, though in general, Tags intended for UHF RFID will operate at least somewhat across the entire band. If you know the Tags will only be used in one region, you might select a more-sharply-tuned Tag in order to achieve maximum range, it that's important to your application.
thanks but we wish more details on this topic
There is certainly a lot to say on the topic of frequency, but for the sake of keeping my content short and as simplistic as possible, I covered the basics in this. If you have certain things you’d like a deeper explanation on, please comment below and I can put that in a longer form video! Thanks for engaging!
@@techmadesimple-ColynnBlack European freq, Chinese freq,us freq, tag freq, encoding types., most used encoding, most used programs to.encode , the math of encoding and decoding
Thanks for the explanation, but please i need to know how to duplicate the smart lock card, please answer me question, because I don’t know how can I make one more access copy for the door.