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We will see about the RFID technology,
which is also known as a radio frequency identification.
So in this video,
we will see what is RFID what are the different applications of the society what is inside the RFID chip and how this RFID works so fast for let's start with what is RFID for this radio frequency identification for RFID is a technology is working on the frequency of radio waves.
So this technology is used to automatically identify the objects or tracking the objects now here this object could be anything the object could be a books in the library for it could be
Any item which are purchasing from the shopping mall or it could be the inventory in the warehouse for maybe it could be your own car and not only the objects but it can be used for the tracking the animals as well as the birds show in this RFID Technology the RFID tag is used to get attached to the object which he wants to track.
So this RFID reader is continuously sending radio waves.
So whenever this object is in the range of The Reader then this RFID tag used to transmit its feedback signal to the reader.
So it is very similar to the technology which is used in a barcode.
But in a barcode the object in the scanner should be in a line of sight is RFID technology is not a line of sight Technology so as far is object is within the range of The Reader object is able to identify the read it is able to send a feedback signal Bekhudi reader using RFID Technology we can track when multiple objects at the same time.
So now let's see what is inside this RFID system.
So as you
Discuss this RFID system contains two components RFID reader and RFID tags.
Now. This RFID tags are also coming in many ways like this RFID tag could be active attack and passive techaura could be a semi passive take now this passive text not have their own power supply.
So this specific guidelines on the radio waves which is coming from the RFID reader for the source of energy in case of semi passive tag are used to have their own power supply,
but for transmitting the feedback signal back to the RFID reader,
they used to rely on the signal which is coming from the RFID reader while in case of active attack the used to have their own power supply,
but for transferring the signal Back To The Reader also they are relying on their own power supply.
So as passive'
take do not have their own power supplies for the range is less compared to the actor won the semi passive attacks on light sunao.
First of all,
let's see what is inside this RFID reader.
So this RFID readers are coming in a many size in the shapes so this
Could be a handheld reader for it could be as large as the size of a door which normally see inside the shopping malls.
So this RFID reader mainly consists of three components to the first component of the RFID reader is the RF signal generator.
So this signal generator generates radio waves which are transmitted using this antenna also to receive the feedback signal which is coming from the tag.
The RFID reader also have a receiver of signal detector and to process the information which is been sent by the RFID tag this RFID reader also over microcontroller for many times.
This RFID reader is directly connected to the computer now,
let's see about the RFID tags for most of the tags which are being used today Aarav passive attacks because this specific tags are quite cheaper compared to the active tax as well as as they do not require any power source with their white compact SUV this facilitates are also coming in many forms.
So this passage that could be either size of a kitchen or it could be the size of a credit card from maybe it could be
The form of a label.
So let's see.
What are the basic components inside this RFID tag to the first component that you see inside RFID tag is a transponder which receives the radio waves which are coming from the reader and send the feedback signal back to the reader as the passive attacks do not have their own supply.
So they rely on the radio waves which are coming from the reader.
So they use to get the energy from the video which are coming from The Reader using rectifier circuit.
The energy that is coming from the radio waves is stored across the capacitor in this energy is used as a supply for the controller as well as the memory element inside is RFID text you later see the working principle for this RFID system.
So before he is working principle let us see the different frequencies at which this RFID tags are operated Saumil this RFID tags are operated frequencies.
The low frequency range is the high frequency range in the Ultra high frequency range.
So this frequency range of frequency operation,
where is which country to country but majority of the countries
Just follow this frequencies for the operation for the RFID tags.
So as low frequency signals can travel very short distance when the range of RFID tags,
which is using this low frequency range is up to the 10 centimetres.
So this high frequency radio waves can travel up to the one metre while the Ultra high frequency radio waves can travel much longer the RFID tags,
which are using this Ultra high frequency can travel upto 10 to 15 years.
So now let us see the working principle for this RFID tag.
Now, this working principle also depends upon the frequency of operation of the low frequency and the high frequency operation.
The working principle is based on the inductive coupling in case of high frequency RFID tags.
The working principle is based on the electromagnetic coupling.
So faster for letters in the working principle for this low frequency and high frequency RFID tags.
So as you said earlier this RFID reader continuously sending a radio waves with particular frequency.
So now this
Radio waves which is been sent by this RFID reader 2003 purposes first.
It induces the inner power into the Aztec second it provide the synchronisation clock for the passive attacks III IT act as a career for the data which is coming back from the RFID tag.
So these are the basic 3 purpose is which is being served by this radio waves which is sent by this RFID Reader in case of low frequency in high frequency operation as RFID reader and take a very close to each other to the working principle is based on the inductive coupling show the field,
which is generated by is RFID reader used to get couple with the antonym of RFID tag.
And because of this mutual coupling the voltage will get induced across the coil of a RFID tag.
Now, the some portion of this voltage is getting rectified and used as a power supply for the controller as well as the memory elements now as the RFID reader is sending a radio waves of a particular frequency to voltage that is induced across the coil is also
Particular frequency,
so this induced voltage is also used to deliver synchronisation clock for the controller.
So now suppose if we connect a load across the soil then current will start flowing through this load and if you change the impedance of this load then the current is flowing through this load will also changed so now suppose if we switch on and off this load then the current will also switch on and off.
So this thing of current rate of change of Karan also generates a voltage in a RFID reader.
So this switching on and off the load is known as the load modulation.
So now suppose if you switch on and off this load according to the data that is stored inside this RFID tag than that data can be read by the RFID reader in the form of a voltage.
So in this way using this load modulation.
We are changing the voltage that is generated across RFID reader coil and in this way we are generating the modulation on a carrier frequency.
So in this was in a low frequency in hybrid,
RFID tags using this load modulation technique that data is been sent back to the RFID reader.
So now let's see the working principle for the Ultra high frequency.
So in case of ultra high frequency is the distance between the reader and the tag is a few metres.
So the coupling between the reader and the coil will be the far field coupling.
So this RFID reader continuously sending the radio waves of a particular frequency towards the tag and In response this tag is sending a weak signal to the RFID reader now this week signal which is being sent back to the RFID reader is the best rated signal in the intensity of this backscattered signal depends upon the Lord matching across this coin.
So if the load is matched exactly in the intensity of the backscattered signal will be more but if the load is not match exactly the intensity of this backscattered signal will be less.
So in this way by changing the condition of a load we can change the intensity of this backscatter.
And if you change the condition of a load according to the data that is being stored across this RFID tag and their data can be sent back to the RFID reader.
So in this way RFID reader is able to change that data now in case of a farmer field coupling is a distance between the RFID reader and take is a few metres.
So the initial signal which is being sent by The Reader should be strong so that the backscattered signal can be retrieved by this RFID reader.
So this is how in a case of a farmer field coupling the signal is sent back to the RFID reader using this backscattered modulation technique.
So now let us see the different application of this RFID Technology for this RFID is used in a wide range of applications and many of the applications which have already discuss.
So here I am listening the few applications in which this RFID system is used in this video you understood.
What is this RFID technology and how this software Technologies working.
So if you have any questions or suggestion,
please let
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